From cd0e4c32635cf648f70153f0a25974e687ccd197 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20F=C3=A4rnstrand?= <faern@faern.net>
Date: Sun, 13 Oct 2019 11:43:26 +0200
Subject: [PATCH] Implement Error::source on IntoStringError

IntoStringError only implemented Error::cause, which is
deprecated. This implemements Error::source instead.
Error::cause will still work as before, thanks to the default
implementation.
---
 src/libstd/ffi/c_str.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libstd/ffi/c_str.rs b/src/libstd/ffi/c_str.rs
index d7f4cc5d1fdaa..483f2ba52eca6 100644
--- a/src/libstd/ffi/c_str.rs
+++ b/src/libstd/ffi/c_str.rs
@@ -919,7 +919,7 @@ impl Error for IntoStringError {
         "C string contained non-utf8 bytes"
     }
 
-    fn cause(&self) -> Option<&dyn Error> {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
         Some(&self.error)
     }
 }