1 files changed, 38 insertions, 0 deletions
diff --git a/src/test/ui/process/multi-panic.rs b/src/test/ui/process/multi-panic.rs
new file mode 100644
index 000000000..a1887c218
--- /dev/null
+++ b/src/test/ui/process/multi-panic.rs
@@ -0,0 +1,38 @@
+// run-pass
+// ignore-emscripten no processes
+// ignore-sgx no processes
+// needs-unwind
+
+fn check_for_no_backtrace(test: std::process::Output) {
+    assert!(!test.status.success());
+    let err = String::from_utf8_lossy(&test.stderr);
+    let mut it = err.lines();
+
+    assert_eq!(it.next().map(|l| l.starts_with("thread '<unnamed>' panicked at")), Some(true));
+    assert_eq!(it.next(), Some("note: run with `RUST_BACKTRACE=1` \
+                                environment variable to display a backtrace"));
+    assert_eq!(it.next().map(|l| l.starts_with("thread 'main' panicked at")), Some(true));
+    assert_eq!(it.next(), None);
+}
+
+fn main() {
+    let args: Vec<String> = std::env::args().collect();
+    if args.len() > 1 && args[1] == "run_test" {
+        let _ = std::thread::spawn(|| {
+            panic!();
+        }).join();
+
+        panic!();
+    } else {
+        let test = std::process::Command::new(&args[0]).arg("run_test")
+                                                       .env_remove("RUST_BACKTRACE")
+                                                       .output()
+                                                       .unwrap();
+        check_for_no_backtrace(test);
+        let test = std::process::Command::new(&args[0]).arg("run_test")
+                                                       .env("RUST_BACKTRACE","0")
+                                                       .output()
+                                                       .unwrap();
+        check_for_no_backtrace(test);
+    }
+}