std: add return address parameter to panic fn

83 files changed, 84 insertions, 84 deletions

diff --git a/test/cases/compile_errors/stage1/obj/wrong_panic_signature_generic_function.zig b/test/cases/compile_errors/stage1/obj/wrong_panic_signature_generic_function.zig
index 45de2fc6cb..37af5e5fce 100644
--- a/test/cases/compile_errors/stage1/obj/wrong_panic_signature_generic_function.zig
+++ b/test/cases/compile_errors/stage1/obj/wrong_panic_signature_generic_function.zig
@@ -1,4 +1,4 @@
-pub fn panic(comptime msg: []const u8, error_return_trace: ?*builtin.StackTrace) noreturn {
+pub fn panic(comptime msg: []const u8, error_return_trace: ?*builtin.StackTrace, _: ?usize) noreturn {
     _ = msg; _ = error_return_trace;
     while (true) {}
 }
@@ -8,5 +8,5 @@ const builtin = @import("std").builtin;
 // backend=stage1
 // target=native
 //
-// error: expected type 'fn([]const u8, ?*std.builtin.StackTrace) noreturn', found 'fn([]const u8,anytype) anytype'
+// error: expected type 'fn([]const u8, ?*std.builtin.StackTrace, ?usize) noreturn', found 'fn([]const u8,anytype,anytype) anytype'
 // note: only one of the functions is generic
diff --git a/test/cases/compile_errors/stage1/obj/wrong_panic_signature_runtime_function.zig b/test/cases/compile_errors/stage1/obj/wrong_panic_signature_runtime_function.zig
index 049becaeb1..3848a5bf0c 100644
--- a/test/cases/compile_errors/stage1/obj/wrong_panic_signature_runtime_function.zig
+++ b/test/cases/compile_errors/stage1/obj/wrong_panic_signature_runtime_function.zig
@@ -7,4 +7,4 @@ pub fn panic() void {}
 // backend=stage1
 // target=native
 //
-// error: expected type 'fn([]const u8, ?*std.builtin.StackTrace) noreturn', found 'fn() void'
+// error: expected type 'fn([]const u8, ?*std.builtin.StackTrace, ?usize) noreturn', found 'fn() void'
diff --git a/test/cases/safety/@alignCast misaligned.zig b/test/cases/safety/@alignCast misaligned.zig
index e9530e83fe..aed805cf66 100644
--- a/test/cases/safety/@alignCast misaligned.zig
+++ b/test/cases/safety/@alignCast misaligned.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "incorrect alignment")) {
         std.process.exit(0);
diff --git a/test/cases/safety/@asyncCall with too small a frame.zig b/test/cases/safety/@asyncCall with too small a frame.zig
index e245e9bb47..1a31593058 100644
--- a/test/cases/safety/@asyncCall with too small a frame.zig
+++ b/test/cases/safety/@asyncCall with too small a frame.zig
@@ -1,7 +1,7 @@
 const std = @import("std");
 const builtin = @import("builtin");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = message;
     _ = stack_trace;
     std.process.exit(0);
diff --git a/test/cases/safety/@errSetCast error not present in destination.zig b/test/cases/safety/@errSetCast error not present in destination.zig
index bf4dee8421..2fd0a912e6 100644
--- a/test/cases/safety/@errSetCast error not present in destination.zig
+++ b/test/cases/safety/@errSetCast error not present in destination.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "invalid error code")) {
         std.process.exit(0);
diff --git a/test/cases/safety/@floatToInt cannot fit - negative out of range.zig b/test/cases/safety/@floatToInt cannot fit - negative out of range.zig
index 937e77a173..fa7e628f4a 100644
--- a/test/cases/safety/@floatToInt cannot fit - negative out of range.zig
+++ b/test/cases/safety/@floatToInt cannot fit - negative out of range.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer part of floating point value out of bounds")) {
         std.process.exit(0);
diff --git a/test/cases/safety/@floatToInt cannot fit - negative to unsigned.zig b/test/cases/safety/@floatToInt cannot fit - negative to unsigned.zig
index 65da9b2da5..5bab7710b1 100644
--- a/test/cases/safety/@floatToInt cannot fit - negative to unsigned.zig
+++ b/test/cases/safety/@floatToInt cannot fit - negative to unsigned.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer part of floating point value out of bounds")) {
         std.process.exit(0);
diff --git a/test/cases/safety/@floatToInt cannot fit - positive out of range.zig b/test/cases/safety/@floatToInt cannot fit - positive out of range.zig
index e7abf0cf63..fe931e8751 100644
--- a/test/cases/safety/@floatToInt cannot fit - positive out of range.zig
+++ b/test/cases/safety/@floatToInt cannot fit - positive out of range.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer part of floating point value out of bounds")) {
         std.process.exit(0);
diff --git a/test/cases/safety/@intCast to u0.zig b/test/cases/safety/@intCast to u0.zig
index 0f38d59e50..f3f969548b 100644
--- a/test/cases/safety/@intCast to u0.zig
+++ b/test/cases/safety/@intCast to u0.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer cast truncated bits")) {
         std.process.exit(0);
diff --git a/test/cases/safety/@intToEnum - no matching tag value.zig b/test/cases/safety/@intToEnum - no matching tag value.zig
index 0e5f401f6d..c4967b413b 100644
--- a/test/cases/safety/@intToEnum - no matching tag value.zig
+++ b/test/cases/safety/@intToEnum - no matching tag value.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "invalid enum value")) {
         std.process.exit(0);
diff --git a/test/cases/safety/@intToPtr address zero to non-optional byte-aligned pointer.zig b/test/cases/safety/@intToPtr address zero to non-optional byte-aligned pointer.zig
index a3b7f374ce..413959706f 100644
--- a/test/cases/safety/@intToPtr address zero to non-optional byte-aligned pointer.zig
+++ b/test/cases/safety/@intToPtr address zero to non-optional byte-aligned pointer.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "cast causes pointer to be null")) {
         std.process.exit(0);
diff --git a/test/cases/safety/@intToPtr address zero to non-optional pointer.zig b/test/cases/safety/@intToPtr address zero to non-optional pointer.zig
index 8724e98131..457b2d12c0 100644
--- a/test/cases/safety/@intToPtr address zero to non-optional pointer.zig
+++ b/test/cases/safety/@intToPtr address zero to non-optional pointer.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "cast causes pointer to be null")) {
         std.process.exit(0);
diff --git a/test/cases/safety/@tagName on corrupted enum value.zig b/test/cases/safety/@tagName on corrupted enum value.zig
index 4081d171c4..344b75effe 100644
--- a/test/cases/safety/@tagName on corrupted enum value.zig
+++ b/test/cases/safety/@tagName on corrupted enum value.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "invalid enum value")) {
         std.process.exit(0);
diff --git a/test/cases/safety/@tagName on corrupted union value.zig b/test/cases/safety/@tagName on corrupted union value.zig
index eb36fab262..f7ffb07871 100644
--- a/test/cases/safety/@tagName on corrupted union value.zig
+++ b/test/cases/safety/@tagName on corrupted union value.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "invalid enum value")) {
         std.process.exit(0);
diff --git a/test/cases/safety/array slice sentinel mismatch non-scalar.zig b/test/cases/safety/array slice sentinel mismatch non-scalar.zig
index e773b165e8..6ea136bc01 100644
--- a/test/cases/safety/array slice sentinel mismatch non-scalar.zig
+++ b/test/cases/safety/array slice sentinel mismatch non-scalar.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "sentinel mismatch: expected tmp.main.S{ .a = 1 }, found tmp.main.S{ .a = 2 }")) {
         std.process.exit(0);
diff --git a/test/cases/safety/array slice sentinel mismatch vector.zig b/test/cases/safety/array slice sentinel mismatch vector.zig
index 38d020d84a..da20d98869 100644
--- a/test/cases/safety/array slice sentinel mismatch vector.zig
+++ b/test/cases/safety/array slice sentinel mismatch vector.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "sentinel mismatch: expected { 0, 0 }, found { 4, 4 }")) {
         std.process.exit(0);
diff --git a/test/cases/safety/array slice sentinel mismatch.zig b/test/cases/safety/array slice sentinel mismatch.zig
index 8f54b4cc53..fc19618673 100644
--- a/test/cases/safety/array slice sentinel mismatch.zig
+++ b/test/cases/safety/array slice sentinel mismatch.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "sentinel mismatch: expected 0, found 4")) {
         std.process.exit(0);
diff --git a/test/cases/safety/awaiting twice.zig b/test/cases/safety/awaiting twice.zig
index 867263de6e..6767ad4e76 100644
--- a/test/cases/safety/awaiting twice.zig
+++ b/test/cases/safety/awaiting twice.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = message;
     _ = stack_trace;
     std.process.exit(0);
diff --git a/test/cases/safety/bad union field access.zig b/test/cases/safety/bad union field access.zig
index bdde8d9f3a..0badf380fb 100644
--- a/test/cases/safety/bad union field access.zig
+++ b/test/cases/safety/bad union field access.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "access of inactive union field")) {
         std.process.exit(0);
diff --git a/test/cases/safety/calling panic.zig b/test/cases/safety/calling panic.zig
index 29f3a6c663..832bc5f19a 100644
--- a/test/cases/safety/calling panic.zig
+++ b/test/cases/safety/calling panic.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "oh no")) {
         std.process.exit(0);
diff --git a/test/cases/safety/cast []u8 to bigger slice of wrong size.zig b/test/cases/safety/cast []u8 to bigger slice of wrong size.zig
index 6fddb63bee..93d18178a8 100644
--- a/test/cases/safety/cast []u8 to bigger slice of wrong size.zig
+++ b/test/cases/safety/cast []u8 to bigger slice of wrong size.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "exact division produced remainder")) {
         std.process.exit(0);
diff --git a/test/cases/safety/cast integer to global error and no code matches.zig b/test/cases/safety/cast integer to global error and no code matches.zig
index d423704039..466bf8d2ca 100644
--- a/test/cases/safety/cast integer to global error and no code matches.zig
+++ b/test/cases/safety/cast integer to global error and no code matches.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "invalid error code")) {
         std.process.exit(0);
diff --git a/test/cases/safety/empty slice with sentinel out of bounds.zig b/test/cases/safety/empty slice with sentinel out of bounds.zig
index d989a33541..69201fde30 100644
--- a/test/cases/safety/empty slice with sentinel out of bounds.zig
+++ b/test/cases/safety/empty slice with sentinel out of bounds.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "index out of bounds: index 1, len 0")) {
         std.process.exit(0);
diff --git a/test/cases/safety/error return trace across suspend points.zig b/test/cases/safety/error return trace across suspend points.zig
index b8cb90505a..28c53cb6d1 100644
--- a/test/cases/safety/error return trace across suspend points.zig
+++ b/test/cases/safety/error return trace across suspend points.zig
@@ -1,7 +1,7 @@
 const std = @import("std");
 
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = message;
     _ = stack_trace;
     std.process.exit(0);
diff --git a/test/cases/safety/exact division failure - vectors.zig b/test/cases/safety/exact division failure - vectors.zig
index 9b792b33cf..3c515cbdf1 100644
--- a/test/cases/safety/exact division failure - vectors.zig
+++ b/test/cases/safety/exact division failure - vectors.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "exact division produced remainder")) {
         std.process.exit(0);
diff --git a/test/cases/safety/exact division failure.zig b/test/cases/safety/exact division failure.zig
index ea4d39ed22..cdf1b1fb8d 100644
--- a/test/cases/safety/exact division failure.zig
+++ b/test/cases/safety/exact division failure.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "exact division produced remainder")) {
         std.process.exit(0);
diff --git a/test/cases/safety/intToPtr with misaligned address.zig b/test/cases/safety/intToPtr with misaligned address.zig
index 6cb085a64b..e53c7e9087 100644
--- a/test/cases/safety/intToPtr with misaligned address.zig
+++ b/test/cases/safety/intToPtr with misaligned address.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "incorrect alignment")) {
         std.process.exit(0);
diff --git a/test/cases/safety/integer addition overflow.zig b/test/cases/safety/integer addition overflow.zig
index aa2ab60dd4..4f7c5b2cb3 100644
--- a/test/cases/safety/integer addition overflow.zig
+++ b/test/cases/safety/integer addition overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer overflow")) {
         std.process.exit(0);
diff --git a/test/cases/safety/integer division by zero - vectors.zig b/test/cases/safety/integer division by zero - vectors.zig
index 0789f7f088..ed7ac7777b 100644
--- a/test/cases/safety/integer division by zero - vectors.zig
+++ b/test/cases/safety/integer division by zero - vectors.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "division by zero")) {
         std.process.exit(0);
diff --git a/test/cases/safety/integer division by zero.zig b/test/cases/safety/integer division by zero.zig
index 46f57c1117..0d1b79d26d 100644
--- a/test/cases/safety/integer division by zero.zig
+++ b/test/cases/safety/integer division by zero.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "division by zero")) {
         std.process.exit(0);
diff --git a/test/cases/safety/integer multiplication overflow.zig b/test/cases/safety/integer multiplication overflow.zig
index af7e638381..641801277d 100644
--- a/test/cases/safety/integer multiplication overflow.zig
+++ b/test/cases/safety/integer multiplication overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer overflow")) {
         std.process.exit(0);
diff --git a/test/cases/safety/integer negation overflow.zig b/test/cases/safety/integer negation overflow.zig
index e48ffff761..3d4c134c4a 100644
--- a/test/cases/safety/integer negation overflow.zig
+++ b/test/cases/safety/integer negation overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer overflow")) {
         std.process.exit(0);
diff --git a/test/cases/safety/integer subtraction overflow.zig b/test/cases/safety/integer subtraction overflow.zig
index 6d9380ee26..84a16f55b8 100644
--- a/test/cases/safety/integer subtraction overflow.zig
+++ b/test/cases/safety/integer subtraction overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer overflow")) {
         std.process.exit(0);
diff --git a/test/cases/safety/invalid resume of async function.zig b/test/cases/safety/invalid resume of async function.zig
index 2ed5704c74..c58f13b99d 100644
--- a/test/cases/safety/invalid resume of async function.zig
+++ b/test/cases/safety/invalid resume of async function.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = message;
     _ = stack_trace;
     std.process.exit(0);
diff --git a/test/cases/safety/modrem by zero.zig b/test/cases/safety/modrem by zero.zig
index 435570f2fb..f201062c0e 100644
--- a/test/cases/safety/modrem by zero.zig
+++ b/test/cases/safety/modrem by zero.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "division by zero")) {
         std.process.exit(0);
diff --git a/test/cases/safety/modulus by zero.zig b/test/cases/safety/modulus by zero.zig
index 9d57865a87..6714458979 100644
--- a/test/cases/safety/modulus by zero.zig
+++ b/test/cases/safety/modulus by zero.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "division by zero")) {
         std.process.exit(0);
diff --git a/test/cases/safety/nosuspend function call, callee suspends.zig b/test/cases/safety/nosuspend function call, callee suspends.zig
index 42daa4a9bd..50f457f314 100644
--- a/test/cases/safety/nosuspend function call, callee suspends.zig
+++ b/test/cases/safety/nosuspend function call, callee suspends.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = message;
     _ = stack_trace;
     std.process.exit(0);
diff --git a/test/cases/safety/optional unwrap operator on C pointer.zig b/test/cases/safety/optional unwrap operator on C pointer.zig
index 10e605cadd..a435219233 100644
--- a/test/cases/safety/optional unwrap operator on C pointer.zig
+++ b/test/cases/safety/optional unwrap operator on C pointer.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "attempt to use null value")) {
         std.process.exit(0);
diff --git a/test/cases/safety/optional unwrap operator on null pointer.zig b/test/cases/safety/optional unwrap operator on null pointer.zig
index 3d2991d9ec..5749be9e36 100644
--- a/test/cases/safety/optional unwrap operator on null pointer.zig
+++ b/test/cases/safety/optional unwrap operator on null pointer.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "attempt to use null value")) {
         std.process.exit(0);
diff --git a/test/cases/safety/out of bounds slice access.zig b/test/cases/safety/out of bounds slice access.zig
index ddd9e74cf2..b4c87948a5 100644
--- a/test/cases/safety/out of bounds slice access.zig
+++ b/test/cases/safety/out of bounds slice access.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "index out of bounds: index 4, len 4")) {
         std.process.exit(0);
diff --git a/test/cases/safety/pointer casting null to non-optional pointer.zig b/test/cases/safety/pointer casting null to non-optional pointer.zig
index e46b84f783..6ec47f52fb 100644
--- a/test/cases/safety/pointer casting null to non-optional pointer.zig
+++ b/test/cases/safety/pointer casting null to non-optional pointer.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "cast causes pointer to be null")) {
         std.process.exit(0);
diff --git a/test/cases/safety/pointer slice sentinel mismatch.zig b/test/cases/safety/pointer slice sentinel mismatch.zig
index ec25ec2969..3972528edf 100644
--- a/test/cases/safety/pointer slice sentinel mismatch.zig
+++ b/test/cases/safety/pointer slice sentinel mismatch.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "sentinel mismatch: expected 0, found 4")) {
         std.process.exit(0);
diff --git a/test/cases/safety/remainder division by zero.zig b/test/cases/safety/remainder division by zero.zig
index 71e295c4dd..3dc97f6e16 100644
--- a/test/cases/safety/remainder division by zero.zig
+++ b/test/cases/safety/remainder division by zero.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "division by zero")) {
         std.process.exit(0);
diff --git a/test/cases/safety/resuming a function which is awaiting a call.zig b/test/cases/safety/resuming a function which is awaiting a call.zig
index b344441507..47545584ea 100644
--- a/test/cases/safety/resuming a function which is awaiting a call.zig
+++ b/test/cases/safety/resuming a function which is awaiting a call.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = message;
     _ = stack_trace;
     std.process.exit(0);
diff --git a/test/cases/safety/resuming a function which is awaiting a frame.zig b/test/cases/safety/resuming a function which is awaiting a frame.zig
index e63b49183e..26df1ae900 100644
--- a/test/cases/safety/resuming a function which is awaiting a frame.zig
+++ b/test/cases/safety/resuming a function which is awaiting a frame.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = message;
     _ = stack_trace;
     std.process.exit(0);
diff --git a/test/cases/safety/resuming a non-suspended function which has been suspended and resumed.zig b/test/cases/safety/resuming a non-suspended function which has been suspended and resumed.zig
index 54de0b9ebd..e03974f08d 100644
--- a/test/cases/safety/resuming a non-suspended function which has been suspended and resumed.zig
+++ b/test/cases/safety/resuming a non-suspended function which has been suspended and resumed.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = message;
     _ = stack_trace;
     std.process.exit(0);
diff --git a/test/cases/safety/resuming a non-suspended function which never been suspended.zig b/test/cases/safety/resuming a non-suspended function which never been suspended.zig
index 8c35753d6d..fb3f5aa307 100644
--- a/test/cases/safety/resuming a non-suspended function which never been suspended.zig
+++ b/test/cases/safety/resuming a non-suspended function which never been suspended.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = message;
     _ = stack_trace;
     std.process.exit(0);
diff --git a/test/cases/safety/shift left by huge amount.zig b/test/cases/safety/shift left by huge amount.zig
index e786a739d6..d89f7d4ebe 100644
--- a/test/cases/safety/shift left by huge amount.zig
+++ b/test/cases/safety/shift left by huge amount.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "shift amount is greater than the type size")) {
         std.process.exit(0);
diff --git a/test/cases/safety/shift right by huge amount.zig b/test/cases/safety/shift right by huge amount.zig
index a45b8c24ce..8107bc1738 100644
--- a/test/cases/safety/shift right by huge amount.zig
+++ b/test/cases/safety/shift right by huge amount.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "shift amount is greater than the type size")) {
         std.process.exit(0);
diff --git a/test/cases/safety/signed integer division overflow - vectors.zig b/test/cases/safety/signed integer division overflow - vectors.zig
index 8bc5be0d63..53e72e90fe 100644
--- a/test/cases/safety/signed integer division overflow - vectors.zig
+++ b/test/cases/safety/signed integer division overflow - vectors.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer overflow")) {
         std.process.exit(0);
diff --git a/test/cases/safety/signed integer division overflow.zig b/test/cases/safety/signed integer division overflow.zig
index 6d17c284df..9d1014ceec 100644
--- a/test/cases/safety/signed integer division overflow.zig
+++ b/test/cases/safety/signed integer division overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer overflow")) {
         std.process.exit(0);
diff --git a/test/cases/safety/signed integer not fitting in cast to unsigned integer - widening.zig b/test/cases/safety/signed integer not fitting in cast to unsigned integer - widening.zig
index 6ee23c9aee..a79298b7da 100644
--- a/test/cases/safety/signed integer not fitting in cast to unsigned integer - widening.zig
+++ b/test/cases/safety/signed integer not fitting in cast to unsigned integer - widening.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "attempt to cast negative value to unsigned integer")) {
         std.process.exit(0);
diff --git a/test/cases/safety/signed integer not fitting in cast to unsigned integer.zig b/test/cases/safety/signed integer not fitting in cast to unsigned integer.zig
index 5c21e0a098..6c4e9e256d 100644
--- a/test/cases/safety/signed integer not fitting in cast to unsigned integer.zig
+++ b/test/cases/safety/signed integer not fitting in cast to unsigned integer.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "attempt to cast negative value to unsigned integer")) {
         std.process.exit(0);
diff --git a/test/cases/safety/signed shift left overflow.zig b/test/cases/safety/signed shift left overflow.zig
index 75e9711032..f9a4db81ce 100644
--- a/test/cases/safety/signed shift left overflow.zig
+++ b/test/cases/safety/signed shift left overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "left shift overflowed bits")) {
         std.process.exit(0);
diff --git a/test/cases/safety/signed shift right overflow.zig b/test/cases/safety/signed shift right overflow.zig
index 52c6158a4d..7d71b9ffbd 100644
--- a/test/cases/safety/signed shift right overflow.zig
+++ b/test/cases/safety/signed shift right overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "right shift overflowed bits")) {
         std.process.exit(0);
diff --git a/test/cases/safety/signed-unsigned vector cast.zig b/test/cases/safety/signed-unsigned vector cast.zig
index 5d8a2ea271..d287c0a1ae 100644
--- a/test/cases/safety/signed-unsigned vector cast.zig
+++ b/test/cases/safety/signed-unsigned vector cast.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "attempt to cast negative value to unsigned integer")) {
         std.process.exit(0);
diff --git a/test/cases/safety/slice sentinel mismatch - floats.zig b/test/cases/safety/slice sentinel mismatch - floats.zig
index 3d08872ca7..843da93b01 100644
--- a/test/cases/safety/slice sentinel mismatch - floats.zig
+++ b/test/cases/safety/slice sentinel mismatch - floats.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "sentinel mismatch: expected 1.20000004e+00, found 4.0e+00")) {
         std.process.exit(0);
diff --git a/test/cases/safety/slice sentinel mismatch - optional pointers.zig b/test/cases/safety/slice sentinel mismatch - optional pointers.zig
index fbc6fcf428..6be303d9aa 100644
--- a/test/cases/safety/slice sentinel mismatch - optional pointers.zig
+++ b/test/cases/safety/slice sentinel mismatch - optional pointers.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "sentinel mismatch: expected null, found i32@10")) {
         std.process.exit(0);
diff --git a/test/cases/safety/slice slice sentinel mismatch.zig b/test/cases/safety/slice slice sentinel mismatch.zig
index b1bca1a11f..635706b2c5 100644
--- a/test/cases/safety/slice slice sentinel mismatch.zig
+++ b/test/cases/safety/slice slice sentinel mismatch.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "sentinel mismatch: expected 0, found 4")) {
         std.process.exit(0);
diff --git a/test/cases/safety/slice with sentinel out of bounds - runtime len.zig b/test/cases/safety/slice with sentinel out of bounds - runtime len.zig
index 524c69d7b7..2f27bebd55 100644
--- a/test/cases/safety/slice with sentinel out of bounds - runtime len.zig
+++ b/test/cases/safety/slice with sentinel out of bounds - runtime len.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "index out of bounds: index 5, len 4")) {
         std.process.exit(0);
diff --git a/test/cases/safety/slice with sentinel out of bounds.zig b/test/cases/safety/slice with sentinel out of bounds.zig
index 636235a5b3..1683dc9d3f 100644
--- a/test/cases/safety/slice with sentinel out of bounds.zig
+++ b/test/cases/safety/slice with sentinel out of bounds.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "index out of bounds: index 5, len 4")) {
         std.process.exit(0);
diff --git a/test/cases/safety/slicing null C pointer - runtime len.zig b/test/cases/safety/slicing null C pointer - runtime len.zig
index 2767253612..eda9de20d2 100644
--- a/test/cases/safety/slicing null C pointer - runtime len.zig
+++ b/test/cases/safety/slicing null C pointer - runtime len.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "attempt to use null value")) {
         std.process.exit(0);
diff --git a/test/cases/safety/slicing null C pointer.zig b/test/cases/safety/slicing null C pointer.zig
index f5041adae7..6ef049c6a1 100644
--- a/test/cases/safety/slicing null C pointer.zig
+++ b/test/cases/safety/slicing null C pointer.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "attempt to use null value")) {
         std.process.exit(0);
diff --git a/test/cases/safety/switch on corrupted enum value.zig b/test/cases/safety/switch on corrupted enum value.zig
index fd94976763..2240fe0c8e 100644
--- a/test/cases/safety/switch on corrupted enum value.zig
+++ b/test/cases/safety/switch on corrupted enum value.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "switch on corrupt value")) {
         std.process.exit(0);
diff --git a/test/cases/safety/switch on corrupted union value.zig b/test/cases/safety/switch on corrupted union value.zig
index 059f0dc042..bfb755514a 100644
--- a/test/cases/safety/switch on corrupted union value.zig
+++ b/test/cases/safety/switch on corrupted union value.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "switch on corrupt value")) {
         std.process.exit(0);
diff --git a/test/cases/safety/truncating vector cast.zig b/test/cases/safety/truncating vector cast.zig
index 5985952e02..e81a6e64ef 100644
--- a/test/cases/safety/truncating vector cast.zig
+++ b/test/cases/safety/truncating vector cast.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer cast truncated bits")) {
         std.process.exit(0);
diff --git a/test/cases/safety/unreachable.zig b/test/cases/safety/unreachable.zig
index f752016aad..492f7958b1 100644
--- a/test/cases/safety/unreachable.zig
+++ b/test/cases/safety/unreachable.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "reached unreachable code")) {
         std.process.exit(0);
diff --git a/test/cases/safety/unsigned integer not fitting in cast to signed integer - same bit count.zig b/test/cases/safety/unsigned integer not fitting in cast to signed integer - same bit count.zig
index ca901560f0..f370f76557 100644
--- a/test/cases/safety/unsigned integer not fitting in cast to signed integer - same bit count.zig
+++ b/test/cases/safety/unsigned integer not fitting in cast to signed integer - same bit count.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer cast truncated bits")) {
         std.process.exit(0);
diff --git a/test/cases/safety/unsigned shift left overflow.zig b/test/cases/safety/unsigned shift left overflow.zig
index 9d6b6a3c48..d38d8f6ecf 100644
--- a/test/cases/safety/unsigned shift left overflow.zig
+++ b/test/cases/safety/unsigned shift left overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "left shift overflowed bits")) {
         std.process.exit(0);
diff --git a/test/cases/safety/unsigned shift right overflow.zig b/test/cases/safety/unsigned shift right overflow.zig
index 500e82866b..121797a17d 100644
--- a/test/cases/safety/unsigned shift right overflow.zig
+++ b/test/cases/safety/unsigned shift right overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "right shift overflowed bits")) {
         std.process.exit(0);
diff --git a/test/cases/safety/unsigned-signed vector cast.zig b/test/cases/safety/unsigned-signed vector cast.zig
index eb3995269f..d4b80fb05c 100644
--- a/test/cases/safety/unsigned-signed vector cast.zig
+++ b/test/cases/safety/unsigned-signed vector cast.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer cast truncated bits")) {
         std.process.exit(0);
diff --git a/test/cases/safety/unwrap error switch.zig b/test/cases/safety/unwrap error switch.zig
index 1df0253e09..0723a9fb24 100644
--- a/test/cases/safety/unwrap error switch.zig
+++ b/test/cases/safety/unwrap error switch.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "attempt to unwrap error: Whatever")) {
         std.process.exit(0);
diff --git a/test/cases/safety/unwrap error.zig b/test/cases/safety/unwrap error.zig
index 498461976d..e2d7ea725b 100644
--- a/test/cases/safety/unwrap error.zig
+++ b/test/cases/safety/unwrap error.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "attempt to unwrap error: Whatever")) {
         std.process.exit(0);
diff --git a/test/cases/safety/value does not fit in shortening cast - u0.zig b/test/cases/safety/value does not fit in shortening cast - u0.zig
index 3ff3aa6e6c..9b303e5cf5 100644
--- a/test/cases/safety/value does not fit in shortening cast - u0.zig
+++ b/test/cases/safety/value does not fit in shortening cast - u0.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer cast truncated bits")) {
         std.process.exit(0);
diff --git a/test/cases/safety/value does not fit in shortening cast.zig b/test/cases/safety/value does not fit in shortening cast.zig
index 510273a57b..0e98a09787 100644
--- a/test/cases/safety/value does not fit in shortening cast.zig
+++ b/test/cases/safety/value does not fit in shortening cast.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer cast truncated bits")) {
         std.process.exit(0);
diff --git a/test/cases/safety/vector integer addition overflow.zig b/test/cases/safety/vector integer addition overflow.zig
index 7e34fa9393..c553b46189 100644
--- a/test/cases/safety/vector integer addition overflow.zig
+++ b/test/cases/safety/vector integer addition overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer overflow")) {
         std.process.exit(0);
diff --git a/test/cases/safety/vector integer multiplication overflow.zig b/test/cases/safety/vector integer multiplication overflow.zig
index a2a74072b3..4549f7c3e3 100644
--- a/test/cases/safety/vector integer multiplication overflow.zig
+++ b/test/cases/safety/vector integer multiplication overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer overflow")) {
         std.process.exit(0);
diff --git a/test/cases/safety/vector integer negation overflow.zig b/test/cases/safety/vector integer negation overflow.zig
index 7f59982372..8c2c160c68 100644
--- a/test/cases/safety/vector integer negation overflow.zig
+++ b/test/cases/safety/vector integer negation overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer overflow")) {
         std.process.exit(0);
diff --git a/test/cases/safety/vector integer subtraction overflow.zig b/test/cases/safety/vector integer subtraction overflow.zig
index dbfee3af1e..bc475d9800 100644
--- a/test/cases/safety/vector integer subtraction overflow.zig
+++ b/test/cases/safety/vector integer subtraction overflow.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "integer overflow")) {
         std.process.exit(0);
diff --git a/test/cases/safety/zero casted to error.zig b/test/cases/safety/zero casted to error.zig
index 3a2edf834a..c1be6856a7 100644
--- a/test/cases/safety/zero casted to error.zig
+++ b/test/cases/safety/zero casted to error.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace, _: ?usize) noreturn {
     _ = stack_trace;
     if (std.mem.eql(u8, message, "invalid error code")) {
         std.process.exit(0);
diff --git a/test/cli.zig b/test/cli.zig
index 979478c786..df1a1497e1 100644
--- a/test/cli.zig
+++ b/test/cli.zig
@@ -120,7 +120,7 @@ fn testGodboltApi(zig_exe: []const u8, dir_path: []const u8) anyerror!void {
         \\    return num * num;
         \\}
         \\extern fn zig_panic() noreturn;
-        \\pub fn panic(msg: []const u8, error_return_trace: ?*@import("std").builtin.StackTrace) noreturn {
+        \\pub fn panic(msg: []const u8, error_return_trace: ?*@import("std").builtin.StackTrace, _: ?usize) noreturn {
         \\    _ = msg;
         \\    _ = error_return_trace;
         \\    zig_panic();
diff --git a/test/standalone/issue_339/test.zig b/test/standalone/issue_339/test.zig
index 5e0aafc182..e28839209c 100644
--- a/test/standalone/issue_339/test.zig
+++ b/test/standalone/issue_339/test.zig
@@ -1,5 +1,5 @@
 const StackTrace = @import("std").builtin.StackTrace;
-pub fn panic(msg: []const u8, stack_trace: ?*StackTrace) noreturn {
+pub fn panic(msg: []const u8, stack_trace: ?*StackTrace, _: ?usize) noreturn {
     _ = msg;
     _ = stack_trace;
     @breakpoint();
diff --git a/test/standalone/issue_8550/main.zig b/test/standalone/issue_8550/main.zig
index 615e9aed6a..1f64f03cf2 100644
--- a/test/standalone/issue_8550/main.zig
+++ b/test/standalone/issue_8550/main.zig
@@ -4,7 +4,7 @@ export fn main(r0: u32, r1: u32, atags: u32) callconv(.C) noreturn {
     _ = atags;
     unreachable; // never gets run so it doesn't matter
 }
-pub fn panic(msg: []const u8, error_return_trace: ?*@import("std").builtin.StackTrace) noreturn {
+pub fn panic(msg: []const u8, error_return_trace: ?*@import("std").builtin.StackTrace, _: ?usize) noreturn {
     _ = msg;
     _ = error_return_trace;
     while (true) {}