Fix cppwinrt build concurrency (#3289)

crates/libs/cppwinrt/src/lib.rs

@@ -14,7 +14,13 @@ where
  let mut path = std::env::temp_dir();
  path.push(format!("cppwinrt-{VERSION}.exe"));
 
- std::fs::write(&path, std::include_bytes!("../cppwinrt.exe")).unwrap();
+ let bytes = std::include_bytes!("../cppwinrt.exe");
+
+ // Concurrent builds can cause this to fail, so we just make sure the bytes match on failure.
+ if std::fs::write(&path, bytes).is_err() {
+ assert_eq!(*bytes, *std::fs::read(&path).unwrap());
+ }
+
  let mut command = std::process::Command::new(&path);
  command.args(args);
  let output = command.output().expect("failed to run cppwinrt");