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-rw-r--r--tests/ui/issues/issue-21600.rs18
1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/issues/issue-21600.rs b/tests/ui/issues/issue-21600.rs
new file mode 100644
index 000000000..2e22e5e6f
--- /dev/null
+++ b/tests/ui/issues/issue-21600.rs
@@ -0,0 +1,18 @@
+fn call_it<F>(f: F) where F: Fn() { f(); }
+
+struct A;
+
+impl A {
+ fn gen(&self) {}
+ fn gen_mut(&mut self) {}
+}
+
+fn main() {
+ let mut x = A;
+ call_it(|| {
+ call_it(|| x.gen());
+ call_it(|| x.gen_mut());
+ //~^ ERROR cannot borrow `x` as mutable, as it is a captured variable in a `Fn` closure
+ //~| ERROR cannot borrow `x` as mutable, as it is a captured variable in a `Fn` closure
+ });
+}