Merge pull request #8000 from practicalswift/swiftc-28715-isactuallycanonicalornull-forming-a-cantype-out-of-a-non-canonical-type

Author: swift-ci

validation-test/compiler_crashers/28715-isactuallycanonicalornull-forming-a-cantype-out-of-a-non-canonical-type.swift

@@ -0,0 +1,16 @@
+// 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
+
+// RUN: not --crash %target-swift-frontend %s -emit-ir
+a<
+func a
+{
+func<
+(=
+extension{func t(UInt= 1 + 1 + 1 as?Int){
+struct c
+protocol A