1 files changed, 27 insertions, 0 deletions
diff --git a/test/Index/pch-warn-as-error-code.cpp b/test/Index/pch-warn-as-error-code.cpp
new file mode 100644
index 0000000000000..6a7924a09e631
--- /dev/null
+++ b/test/Index/pch-warn-as-error-code.cpp
@@ -0,0 +1,27 @@
+// RUN: rm -f %t.head.h.pch
+// RUN: c-index-test -write-pch %t.head.h.pch %s -Wuninitialized -Werror=unused 2>&1 | FileCheck -check-prefix=HEAD_DIAGS %s
+// RUN: c-index-test -test-load-source local %s -include %t.head.h -Wuninitialized -Werror=unused 2>&1 | FileCheck -check-prefix=MAIN_DIAGS %s
+
+// Make sure -Wuninitialized works even though the header had a warn-as-error occurrence.
+
+// HEAD_DIAGS: error: unused variable 'x'
+// MAIN_DIAGS: warning: variable 'x1' is uninitialized
+// MAIN_DIAGS-NOT: error: use of undeclared identifier
+
+#ifndef HEADER
+#define HEADER
+
+static void foo_head() {
+  int x;
+}
+
+#else
+
+void test() {
+  int x1; // expected-note {{initialize}}
+  int x2 = x1; // expected-warning {{uninitialized}}
+  (void)x2;
+  foo_head();
+}
+
+#endif