1 files changed, 36 insertions, 0 deletions
diff --git a/src/test/ui/regions/region-bounds-on-objects-and-type-parameters.rs b/src/test/ui/regions/region-bounds-on-objects-and-type-parameters.rs
new file mode 100644
index 000000000..40d2b740b
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+++ b/src/test/ui/regions/region-bounds-on-objects-and-type-parameters.rs
@@ -0,0 +1,36 @@
+// Test related to when a region bound is required to be specified.
+
+trait IsStatic : 'static { }
+trait IsSend : Send { }
+trait Is<'a> : 'a { }
+trait Is2<'a> : 'a { }
+trait SomeTrait { }
+
+// Bounds on object types:
+
+struct Foo<'a,'b,'c> { //~ ERROR parameter `'c` is never used
+    // All of these are ok, because we can derive exactly one bound:
+    a: Box<dyn IsStatic>,
+    b: Box<dyn Is<'static>>,
+    c: Box<dyn Is<'a>>,
+    d: Box<dyn IsSend>,
+    e: Box<dyn Is<'a>+Send>, // we can derive two bounds, but one is 'static, so ok
+    f: Box<dyn SomeTrait>,   // OK, defaults to 'static due to RFC 599.
+    g: Box<dyn SomeTrait+'a>,
+
+    z: Box<dyn Is<'a>+'b+'c>,
+    //~^ ERROR only a single explicit lifetime bound is permitted
+    //~| ERROR lifetime bound not satisfied
+}
+
+fn test<
+    'a,
+    'b,
+    A:IsStatic,
+    B:Is<'a>+Is2<'b>, // OK in a parameter, but not an object type.
+    C:'b+Is<'a>+Is2<'b>,
+    D:Is<'a>+Is2<'static>,
+    E:'a+'b           // OK in a parameter, but not an object type.
+>() { }
+
+fn main() { }