Merge pull request #10495 from practicalswift/swiftc-28797-declbits-beingvalidated-ibv

Author: swift-ci

validation-test/compiler_crashers/28797-declbits-beingvalidated-ibv.swift

@@ -0,0 +1,11 @@
+// This source file is part of the Swift.org open source project
+// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+
+// REQUIRES: asserts
+// RUN: not --crash %target-swift-frontend %s -emit-ir
+{typealias e:P.a
+protocol P{typealias a=a.b:class a