1 files changed, 22 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-34349.stderr b/tests/ui/issues/issue-34349.stderr
new file mode 100644
index 000000000..8e9a16619
--- /dev/null
+++ b/tests/ui/issues/issue-34349.stderr
@@ -0,0 +1,22 @@
+error[E0525]: expected a closure that implements the `Fn` trait, but this closure only implements `FnMut`
+  --> $DIR/issue-34349.rs:16:17
+   |
+LL |     let diary = || {
+   |                 ^^ this closure implements `FnMut`, not `Fn`
+LL |         farewell.push_str("!!!");
+   |         -------- closure is `FnMut` because it mutates the variable `farewell` here
+...
+LL |     apply(diary);
+   |     ----- ----- the requirement to implement `Fn` derives from here
+   |     |
+   |     required by a bound introduced by this call
+   |
+note: required by a bound in `apply`
+  --> $DIR/issue-34349.rs:11:32
+   |
+LL |     fn apply<F>(f: F) where F: Fn() {
+   |                                ^^^^ required by this bound in `apply`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0525`.