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-rw-r--r--src/test/ui/issues/issue-40000.rs9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-40000.rs b/src/test/ui/issues/issue-40000.rs
new file mode 100644
index 000000000..a6e05e7ba
--- /dev/null
+++ b/src/test/ui/issues/issue-40000.rs
@@ -0,0 +1,9 @@
+fn main() {
+ let bar: fn(&mut u32) = |_| {};
+
+ fn foo(x: Box<dyn Fn(&i32)>) {}
+ let bar = Box::new(|x: &i32| {}) as Box<dyn Fn(_)>;
+ foo(bar);
+ //~^ ERROR mismatched types
+ //~| ERROR mismatched types
+}