safety: show error return trace when unwrapping error in switch

1 files changed, 21 insertions, 0 deletions

diff --git a/test/cases/safety/unwrap error switch.zig b/test/cases/safety/unwrap error switch.zig
new file mode 100644
index 0000000000..1df0253e09
--- /dev/null
+++ b/test/cases/safety/unwrap error switch.zig
@@ -0,0 +1,21 @@
+const std = @import("std");
+
+pub fn panic(message: []const u8, stack_trace: ?*std.builtin.StackTrace) noreturn {
+    _ = stack_trace;
+    if (std.mem.eql(u8, message, "attempt to unwrap error: Whatever")) {
+        std.process.exit(0);
+    }
+    std.process.exit(1);
+}
+pub fn main() !void {
+    bar() catch |err| switch (err) {
+        error.Whatever => unreachable,
+    };
+    return error.TestFailed;
+}
+fn bar() !void {
+    return error.Whatever;
+}
+// run
+// backend=llvm
+// target=native