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-rw-r--r--src/test/ui/test-attrs/test-panic-while-printing.rs25
1 files changed, 25 insertions, 0 deletions
diff --git a/src/test/ui/test-attrs/test-panic-while-printing.rs b/src/test/ui/test-attrs/test-panic-while-printing.rs
new file mode 100644
index 000000000..01e460da5
--- /dev/null
+++ b/src/test/ui/test-attrs/test-panic-while-printing.rs
@@ -0,0 +1,25 @@
+// compile-flags:--test
+// run-pass
+// needs-unwind
+// ignore-emscripten no subprocess support
+
+use std::fmt;
+use std::fmt::{Display, Formatter};
+
+pub struct A(Vec<u32>);
+
+impl Display for A {
+ fn fmt(&self, _f: &mut Formatter<'_>) -> fmt::Result {
+ self.0[0];
+ Ok(())
+ }
+}
+
+#[test]
+fn main() {
+ let result = std::panic::catch_unwind(|| {
+ let a = A(vec![]);
+ eprintln!("{}", a);
+ });
+ assert!(result.is_err());
+}