Keep track of when "unrecoverable" errors occur, then allow
clang_saveTranslationUnit() to save a PCH file if the only errors it
contains are recoverable errors. Fixes <rdar://problem/9727804>.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134503 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Index/werror.c b/test/Index/werror.c
new file mode 100644
index 0000000..150095d
--- /dev/null
+++ b/test/Index/werror.c
@@ -0,0 +1,15 @@
+inline int *get_int_ptr(float *fp) {
+  return fp;
+}
+
+#ifdef FATAL
+void fatal(int);
+void fatal(float);
+#endif
+
+// CHECK-FATAL: translation errors
+
+// RUN: c-index-test -write-pch %t.pch -Werror %s
+// RUN: not c-index-test -write-pch %t.pch -DFATAL -Werror %s 2>%t.err
+// RUN: FileCheck -check-prefix=CHECK-FATAL %s < %t.err
+