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-rw-r--r--src/test/ui/issues/issue-18783.rs28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-18783.rs b/src/test/ui/issues/issue-18783.rs
new file mode 100644
index 000000000..d4851ac14
--- /dev/null
+++ b/src/test/ui/issues/issue-18783.rs
@@ -0,0 +1,28 @@
+use std::cell::RefCell;
+
+fn main() {
+ let mut y = 1;
+ let c = RefCell::new(vec![]);
+ c.push(Box::new(|| y = 0));
+ c.push(Box::new(|| y = 0));
+//~^ ERROR cannot borrow `y` as mutable more than once at a time
+}
+
+fn ufcs() {
+ let mut y = 1;
+ let c = RefCell::new(vec![]);
+
+ Push::push(&c, Box::new(|| y = 0));
+ Push::push(&c, Box::new(|| y = 0));
+//~^ ERROR cannot borrow `y` as mutable more than once at a time
+}
+
+trait Push<'c> {
+ fn push<'f: 'c>(&self, push: Box<dyn FnMut() + 'f>);
+}
+
+impl<'c> Push<'c> for RefCell<Vec<Box<dyn FnMut() + 'c>>> {
+ fn push<'f: 'c>(&self, fun: Box<dyn FnMut() + 'f>) {
+ self.borrow_mut().push(fun)
+ }
+}