From 80f5213cee9f98bf37b5e7244f2c71e94b5ed4dc Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Sun, 24 Nov 2019 13:13:33 +0100
Subject: [PATCH] expand type info on __rust_start_panic

---
 src/libstd/panicking.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/libstd/panicking.rs b/src/libstd/panicking.rs
index 62cd190cf7ae..6819a4a04d73 100644
--- a/src/libstd/panicking.rs
+++ b/src/libstd/panicking.rs
@@ -44,6 +44,8 @@ extern {
                                 data: *mut u8,
                                 data_ptr: *mut usize,
                                 vtable_ptr: *mut usize) -> u32;
+
+    /// `payload` is actually a `*mut &mut dyn BoxMeUp` but that would cause FFI warnings.
     #[unwind(allowed)]
     fn __rust_start_panic(payload: usize) -> u32;
 }