X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=library%2Fstd%2Fsrc%2Ferror%2Ftests.rs;h=ee999bd65c3c94cefc7035bca80961648456a98e;hb=20f124a1934cf833467ccfbe6c31daff160fec56;hp=a2a35d96ec918a5b91ead9e51053df3524fb24fa;hpb=837cd9e26c5f741d57c19d4ae35253f26b654a1e;p=rust.git

diff --git a/library/std/src/error/tests.rs b/library/std/src/error/tests.rs
index a2a35d96ec9..ee999bd65c3 100644
--- a/library/std/src/error/tests.rs
+++ b/library/std/src/error/tests.rs
@@ -1,5 +1,6 @@
 use super::Error;
 use crate::fmt;
+use core::any::Demand;
 
 #[derive(Debug, PartialEq)]
 struct A;
@@ -198,8 +199,8 @@ fn source(&self) -> Option<&(dyn Error + 'static)> {
         self.source.as_deref()
     }
 
-    fn backtrace(&self) -> Option<&Backtrace> {
-        self.backtrace.as_ref()
+    fn provide<'a>(&'a self, req: &mut Demand<'a>) {
+        self.backtrace.as_ref().map(|bt| req.provide_ref::<Backtrace>(bt));
     }
 }