1 files changed, 9 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-18183.stderr b/tests/ui/issues/issue-18183.stderr
new file mode 100644
index 000000000..a7dc64708
--- /dev/null
+++ b/tests/ui/issues/issue-18183.stderr
@@ -0,0 +1,9 @@
+error[E0128]: generic parameters with a default cannot use forward declared identifiers
+  --> $DIR/issue-18183.rs:1:20
+   |
+LL | pub struct Foo<Bar=Bar>(Bar);
+   |                    ^^^ defaulted generic parameters cannot be forward declared
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0128`.