1 files changed, 54 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/regions-bound-missing-bound-in-impl.rs b/src/test/ui/borrowck/regions-bound-missing-bound-in-impl.rs
new file mode 100644
index 000000000..141ad5bd2
--- /dev/null
+++ b/src/test/ui/borrowck/regions-bound-missing-bound-in-impl.rs
@@ -0,0 +1,54 @@
+// Check that explicit region bounds are allowed on the various
+// nominal types (but not on other types) and that they are type
+// checked.
+
+struct Inv<'a> { // invariant w/r/t 'a
+    x: &'a mut &'a isize
+}
+
+pub trait Foo<'a, 't> {
+    fn no_bound<'b>(self, b: Inv<'b>);
+    fn has_bound<'b:'a>(self, b: Inv<'b>);
+    fn wrong_bound1<'b,'c,'d:'a+'b>(self, b: Inv<'b>, c: Inv<'c>, d: Inv<'d>);
+    fn wrong_bound2<'b,'c,'d:'a+'b>(self, b: Inv<'b>, c: Inv<'c>, d: Inv<'d>);
+    fn okay_bound<'b,'c,'d:'a+'b+'c>(self, b: Inv<'b>, c: Inv<'c>, d: Inv<'d>);
+    fn another_bound<'x: 'a>(self, x: Inv<'x>, y: Inv<'t>);
+}
+
+impl<'a, 't> Foo<'a, 't> for &'a isize {
+    fn no_bound<'b:'a>(self, b: Inv<'b>) {
+        //~^ ERROR lifetime parameters or bounds on method `no_bound` do not match
+    }
+
+    fn has_bound<'b>(self, b: Inv<'b>) {
+        //~^ ERROR lifetime parameters or bounds on method `has_bound` do not match
+    }
+
+    fn wrong_bound1<'b,'c,'d:'a+'c>(self, b: Inv<'b>, c: Inv<'c>, d: Inv<'d>) {
+        //~^ ERROR method not compatible with trait
+        //~| ERROR method not compatible with trait
+        //
+        // Note: This is a terrible error message. It is caused
+        // because, in the trait, 'b is early bound, and in the impl,
+        // 'c is early bound, so -- after substitution -- the
+        // lifetimes themselves look isomorphic.  We fail because the
+        // lifetimes that appear in the types are in the wrong
+        // order. This should really be fixed by keeping more
+        // information about the lifetime declarations in the trait so
+        // that we can compare better to the impl, even in cross-crate
+        // cases.
+    }
+
+    fn wrong_bound2(self, b: Inv, c: Inv, d: Inv) {
+        //~^ ERROR lifetime parameters or bounds on method `wrong_bound2` do not match the trait
+    }
+
+    fn okay_bound<'b,'c,'e:'b+'c>(self, b: Inv<'b>, c: Inv<'c>, e: Inv<'e>) {
+    }
+
+    fn another_bound<'x: 't>(self, x: Inv<'x>, y: Inv<'t>) {
+        //~^ ERROR E0276
+    }
+}
+
+fn main() { }