Merge pull request #5984 from practicalswift/swiftc-28547-env-dependent-type-in-non-generic-context

[swiftc (137 vs. 5221)] Add crasher in swift::ArchetypeBuilder::addAbstractTypeParamRequirements

Author: practicalswift

validation-test/compiler_crashers/28547-env-dependent-type-in-non-generic-context.swift

@@ -0,0 +1,11 @@
+// This source file is part of the Swift.org open source project
+// Copyright (c) 2014 - 2016 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
+// REQUIRES: asserts
+class A:a
+protocol a{typealias B:A.B