better error message for <Self as Foo>::X

2 files changed, 15 insertions, 0 deletions

diff --git a/ui-tests/src/bin/qualified_self.rs b/ui-tests/src/bin/qualified_self.rs
new file mode 100644
index 0000000..b02f623
--- /dev/null
+++ b/ui-tests/src/bin/qualified_self.rs
@@ -0,0 +1,10 @@
+trait Foo {
+    type X: Into<String>;
+}
+
+#[dynamize::dynamize]
+trait Bar: Foo {
+    fn test(&self) -> <Self as Foo>::X;
+}
+
+fn main() {}
diff --git a/ui-tests/src/bin/qualified_self.stderr b/ui-tests/src/bin/qualified_self.stderr
new file mode 100644
index 0000000..1b5f9f9
--- /dev/null
+++ b/ui-tests/src/bin/qualified_self.stderr
@@ -0,0 +1,5 @@
+error: dynamize does not support associated types of a qualified Self
+ --> src/bin/qualified_self.rs:7:24
+  |
+7 |     fn test(&self) -> <Self as Foo>::X;
+  |                        ^^^^