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-rw-r--r--src/test/ui/issues/issue-18566.rs25
1 files changed, 25 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-18566.rs b/src/test/ui/issues/issue-18566.rs
new file mode 100644
index 000000000..9da904acf
--- /dev/null
+++ b/src/test/ui/issues/issue-18566.rs
@@ -0,0 +1,25 @@
+use std::ops::Deref;
+
+struct MyPtr<'a>(&'a mut usize);
+impl<'a> Deref for MyPtr<'a> {
+ type Target = usize;
+
+ fn deref<'b>(&'b self) -> &'b usize { self.0 }
+}
+
+trait Tr {
+ fn poke(&self, s: &mut usize);
+}
+
+impl Tr for usize {
+ fn poke(&self, s: &mut usize) {
+ *s = 2;
+ }
+}
+
+fn main() {
+ let s = &mut 1;
+
+ MyPtr(s).poke(s);
+ //~^ ERROR cannot borrow `*s` as mutable more than once at a time
+}