From 1993f1efe717680479242e711848a4d38f35cf1b Mon Sep 17 00:00:00 2001
From: Mara Bos <m-ou.se@m-ou.se>
Date: Sat, 24 Oct 2020 21:13:04 +0200
Subject: [PATCH] Test that panic_fmt lint doesn't trigger for custom panic
 macro.

---
 src/test/ui/panic-brace.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/test/ui/panic-brace.rs b/src/test/ui/panic-brace.rs
index d38d8ac4deb3..e3ea7a8bf0f7 100644
--- a/src/test/ui/panic-brace.rs
+++ b/src/test/ui/panic-brace.rs
@@ -15,4 +15,11 @@ fn main() {
     panic!(S); // No warning (yet)
     panic!(concat!("{", "}")); //~ WARN panic message contains an unused formatting placeholder
     panic!(concat!("{", "{")); //~ WARN panic message contains braces
+
+    // Check that the lint only triggers for std::panic and core::panic,
+    // not any panic macro:
+    macro_rules! panic {
+        ($e:expr) => ();
+    }
+    panic!("{}"); // OK
 }