diff --git a/validation-test/compiler_crashers/28493-resolveidenttypecomponent-swift-typechecker-swift-declcontext-llvm-arrayref-swif.swift b/validation-test/compiler_crashers/28493-resolveidenttypecomponent-swift-typechecker-swift-declcontext-llvm-arrayref-swif.swift
new file mode 100644
index 0000000000000..8cba16e330f67
--- /dev/null
+++ b/validation-test/compiler_crashers/28493-resolveidenttypecomponent-swift-typechecker-swift-declcontext-llvm-arrayref-swif.swift
@@ -0,0 +1,24 @@
+// 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 http://swift.org/LICENSE.txt for license information
+// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+
+// RUN: not --crash %target-swift-frontend %s -emit-ir
+class c:A
+let a
+{
+protocol a{
+func d:A.d:A
+class A:a}} _b(array:b{
+struct g:a{
+let a(){{typealias fb
+protocol a<T>:A{
+let e
+typealias f)typealias etypealias e:d class a:a
+protocol AA.h{protocol {a(){struct g:A{
+typealias fb
+class a)class A:A{func<T where S
+class a:a{class A:f:
+for in.E Int S}typea