better error for associated types in supertraits

2 files changed, 11 insertions, 0 deletions

diff --git a/ui-tests/src/bin/supertrait.rs b/ui-tests/src/bin/supertrait.rs
new file mode 100644
index 0000000..1dc4127
--- /dev/null
+++ b/ui-tests/src/bin/supertrait.rs
@@ -0,0 +1,6 @@
+#[dynamize::dynamize]
+trait Foo: Into<Self::X> {
+    type X;
+}
+
+fn main() {}
diff --git a/ui-tests/src/bin/supertrait.stderr b/ui-tests/src/bin/supertrait.stderr
new file mode 100644
index 0000000..ebb1561
--- /dev/null
+++ b/ui-tests/src/bin/supertrait.stderr
@@ -0,0 +1,5 @@
+error: dynamize does not support associated types in supertraits
+ --> src/bin/supertrait.rs:2:17
+  |
+2 | trait Foo: Into<Self::X> {
+  |                 ^^^^