Rollup merge of #51973 - estk:master, r=abonander

Make Stdio handle UnwindSafe

Closes  #51863

This is my first compiler PR. Thanks Niko for the mentor help!

r? @nikomatsakis

1 files changed, 22 insertions, 0 deletions

diff --git a/src/libstd/io/stdio.rs b/src/libstd/io/stdio.rs
index 2472bed5ba4..fce85a200ba 100644
--- a/src/libstd/io/stdio.rs
+++ b/src/libstd/io/stdio.rs
@@ -712,10 +712,32 @@ pub fn _eprint(args: fmt::Arguments) {
 
 #[cfg(test)]
 mod tests {
+    use panic::{UnwindSafe, RefUnwindSafe};
     use thread;
     use super::*;
 
     #[test]
+    fn stdout_unwind_safe() {
+        assert_unwind_safe::<Stdout>();
+    }
+    #[test]
+    fn stdoutlock_unwind_safe() {
+        assert_unwind_safe::<StdoutLock>();
+        assert_unwind_safe::<StdoutLock<'static>>();
+    }
+    #[test]
+    fn stderr_unwind_safe() {
+        assert_unwind_safe::<Stderr>();
+    }
+    #[test]
+    fn stderrlock_unwind_safe() {
+        assert_unwind_safe::<StderrLock>();
+        assert_unwind_safe::<StderrLock<'static>>();
+    }
+
+    fn assert_unwind_safe<T: UnwindSafe + RefUnwindSafe>() {}
+
+    #[test]
     #[cfg_attr(target_os = "emscripten", ignore)]
     fn panic_doesnt_poison() {
         thread::spawn(|| {