1 files changed, 47 insertions, 0 deletions
diff --git a/tests/ui/suggestions/constrain-trait.rs b/tests/ui/suggestions/constrain-trait.rs
new file mode 100644
index 00000000000..99ccf7a7f3b
--- /dev/null
+++ b/tests/ui/suggestions/constrain-trait.rs
@@ -0,0 +1,47 @@
+// run-rustfix
+// check-only
+
+#[derive(Debug)]
+struct Demo {
+    a: String
+}
+
+trait GetString {
+    fn get_a(&self) -> &String;
+}
+
+trait UseString: std::fmt::Debug {
+    fn use_string(&self) {
+        println!("{:?}", self.get_a()); //~ ERROR no method named `get_a` found
+    }
+}
+
+trait UseString2 {
+    fn use_string(&self) {
+        println!("{:?}", self.get_a()); //~ ERROR no method named `get_a` found
+    }
+}
+
+impl GetString for Demo {
+    fn get_a(&self) -> &String {
+        &self.a
+    }
+}
+
+impl UseString for Demo {}
+impl UseString2 for Demo {}
+
+
+#[cfg(test)]
+mod tests {
+    use crate::{Demo, UseString};
+
+    #[test]
+    fn it_works() {
+        let d = Demo { a: "test".to_string() };
+        d.use_string();
+    }
+}
+
+
+fn main() {}