Adding a test for a compiler crash that was fixed in r248069.

Differential Revision: http://reviews.llvm.org/D19048

llvm-svn: 268344
diff --git a/clang/test/Modules/getSourceDescriptor-crash.cpp b/clang/test/Modules/getSourceDescriptor-crash.cpp
new file mode 100644
index 0000000..ebc25c0
--- /dev/null
+++ b/clang/test/Modules/getSourceDescriptor-crash.cpp
@@ -0,0 +1,9 @@
+// RUN: %clang_cc1 -I %S/Inputs/getSourceDescriptor-crash -S -emit-llvm -debug-info-kind=limited -fimplicit-module-maps %s -o - | FileCheck %s
+
+#include "h1.h"
+#include "h1.h"
+
+// CHECK: DIImportedEntity
+// CHECK-SAME: entity: ![[ENTITY:[0-9]+]]
+// CHECK: ![[ENTITY]] = !DIModule
+// CHECK-SAME: name: "foo"