1 files changed, 56 insertions, 0 deletions
diff --git a/src/test/ui/dep-graph/dep-graph-type-alias.rs b/src/test/ui/dep-graph/dep-graph-type-alias.rs
new file mode 100644
index 000000000..0e1b3db19
--- /dev/null
+++ b/src/test/ui/dep-graph/dep-graph-type-alias.rs
@@ -0,0 +1,56 @@
+// Test that changing what a `type` points to does not go unnoticed.
+
+// incremental
+// compile-flags: -Z query-dep-graph
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+#![allow(unused_variables)]
+
+fn main() { }
+
+
+#[rustc_if_this_changed]
+type TypeAlias = u32;
+
+// The type alias directly affects the type of the field,
+// not the enclosing struct:
+#[rustc_then_this_would_need(type_of)] //~ ERROR no path
+struct Struct {
+    #[rustc_then_this_would_need(type_of)] //~ ERROR OK
+    x: TypeAlias,
+    y: u32
+}
+
+#[rustc_then_this_would_need(type_of)] //~ ERROR no path
+enum Enum {
+    Variant1 {
+        #[rustc_then_this_would_need(type_of)] //~ ERROR OK
+        t: TypeAlias
+    },
+    Variant2(i32)
+}
+
+#[rustc_then_this_would_need(type_of)] //~ ERROR no path
+trait Trait {
+    #[rustc_then_this_would_need(fn_sig)] //~ ERROR OK
+    fn method(&self, _: TypeAlias);
+}
+
+struct SomeType;
+
+#[rustc_then_this_would_need(type_of)] //~ ERROR no path
+impl SomeType {
+    #[rustc_then_this_would_need(fn_sig)] //~ ERROR OK
+    #[rustc_then_this_would_need(typeck)] //~ ERROR OK
+    fn method(&self, _: TypeAlias) {}
+}
+
+#[rustc_then_this_would_need(type_of)] //~ ERROR OK
+type TypeAlias2 = TypeAlias;
+
+#[rustc_then_this_would_need(fn_sig)] //~ ERROR OK
+#[rustc_then_this_would_need(typeck)] //~ ERROR OK
+fn function(_: TypeAlias) {
+
+}