1 files changed, 20 insertions, 0 deletions
diff --git a/src/test/ui/trait-bounds/impl-bound-with-references-error.rs b/src/test/ui/trait-bounds/impl-bound-with-references-error.rs
new file mode 100644
index 000000000..e5d0a1aae
--- /dev/null
+++ b/src/test/ui/trait-bounds/impl-bound-with-references-error.rs
@@ -0,0 +1,20 @@
+// Regression test for #105138.
+// This test ensures that the compiler does not add note
+// for implementation of trait whose inner type is erroneous.
+
+pub enum LabelText {
+    Plain,
+}
+
+impl<T> From<T> for LabelText
+//~^ ERROR conflicting implementations of trait `From<LabelText>` for type `LabelText` [E0119]
+where
+    T: Into<Cow<'static, str>>,
+    //~^ ERROR cannot find type `Cow` in this scope [E0412]
+{
+    fn from(text: T) -> Self {
+        LabelText::Plain(text.into())
+    }
+}
+
+fn main() {}