1 files changed, 46 insertions, 0 deletions
diff --git a/src/test/ui/dep-graph/dep-graph-trait-impl-two-traits-same-method.rs b/src/test/ui/dep-graph/dep-graph-trait-impl-two-traits-same-method.rs
new file mode 100644
index 000000000..5da8df570
--- /dev/null
+++ b/src/test/ui/dep-graph/dep-graph-trait-impl-two-traits-same-method.rs
@@ -0,0 +1,46 @@
+// Test that adding an impl to a trait `Foo` DOES affect functions
+// that only use `Bar` if they have methods in common.
+
+// incremental
+// compile-flags: -Z query-dep-graph
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+#![allow(unused_imports)]
+
+fn main() { }
+
+pub trait Foo: Sized {
+    fn method(self) { }
+}
+
+pub trait Bar: Sized {
+    fn method(self) { }
+}
+
+mod x {
+    use {Foo, Bar};
+
+    #[rustc_if_this_changed]
+    impl Foo for u32 { }
+
+    impl Bar for char { }
+}
+
+mod y {
+    use {Foo, Bar};
+
+    #[rustc_then_this_would_need(typeck)] //~ ERROR OK
+    pub fn with_char() {
+        char::method('a');
+    }
+}
+
+mod z {
+    use y;
+
+    #[rustc_then_this_would_need(typeck)] //~ ERROR no path
+    pub fn z() {
+        y::with_char();
+    }
+}