1 files changed, 6 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-20605.rs b/tests/ui/issues/issue-20605.rs
new file mode 100644
index 00000000000..17b7d32ebf5
--- /dev/null
+++ b/tests/ui/issues/issue-20605.rs
@@ -0,0 +1,6 @@
+fn changer<'a>(mut things: Box<dyn Iterator<Item=&'a mut u8>>) {
+    for item in *things { *item = 0 }
+//~^ ERROR the size for values of type
+}
+
+fn main() {}