Fixes a crash when generating dependency file stuff
and output file is not writable. // rdar://9286457.

llvm-svn: 129587
diff --git a/clang/test/Frontend/dependency-generation-crash.c b/clang/test/Frontend/dependency-generation-crash.c
new file mode 100644
index 0000000..181bb71
--- /dev/null
+++ b/clang/test/Frontend/dependency-generation-crash.c
@@ -0,0 +1,4 @@
+// RUN: touch %t
+// RUN: chmod 0 %t
+// %clang -E -dependency-file bla -MT %t -MP -o %t -x c /dev/null
+// rdar://9286457