SeqCst->Relaxed for FIRST_PANIC.

Relaxed is enough to make sure this `swap` results in `true` only once.
rust-lang · Mar 19, 2024 · 9f25a04 · 9f25a04
1 parent 904fef0
commit 9f25a04
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/library/std/src/panicking.rs b/library/std/src/panicking.rs
@@ -272,7 +272,7 @@ fn default_hook(info: &PanicInfo<'_>) {
                 drop(backtrace::print(err, crate::backtrace_rs::PrintFmt::Full))
             }
             Some(BacktraceStyle::Off) => {
-                if FIRST_PANIC.swap(false, Ordering::SeqCst) {
+                if FIRST_PANIC.swap(false, Ordering::Relaxed) {
                     let _ = writeln!(
                         err,
                         "note: run with `RUST_BACKTRACE=1` environment variable to display a \