update lockStderrWriter sites

use the application's Io implementation where possible. This correctly
makes writing to stderr cancelable, fallible, and participate in the
application's event loop. It also removes one more hard-coded
dependency on a secondary Io implementation.

1 files changed, 7 insertions, 4 deletions

diff --git a/src/codegen/aarch64/Select.zig b/src/codegen/aarch64/Select.zig
index f390d83f03..138c70fecf 100644
--- a/src/codegen/aarch64/Select.zig
+++ b/src/codegen/aarch64/Select.zig
@@ -11273,15 +11273,18 @@ fn initValueAdvanced(
     return @enumFromInt(isel.values.items.len);
 }
 pub fn dumpValues(isel: *Select, which: enum { only_referenced, all }) void {
-    errdefer |err| @panic(@errorName(err));
-    const stderr, _ = std.debug.lockStderrWriter(&.{});
-    defer std.debug.unlockStderrWriter();
-
     const zcu = isel.pt.zcu;
+    const io = zcu.comp.io;
     const gpa = zcu.gpa;
     const ip = &zcu.intern_pool;
     const nav = ip.getNav(isel.nav_index);
 
+    errdefer |err| @panic(@errorName(err));
+
+    const stderr_writer = io.lockStderrWriter(&.{}) catch return;
+    defer io.unlockStderrWriter();
+    const stderr = &stderr_writer.interface;
+
     var reverse_live_values: std.AutoArrayHashMapUnmanaged(Value.Index, std.ArrayList(Air.Inst.Index)) = .empty;
     defer {
         for (reverse_live_values.values()) |*list| list.deinit(gpa);