1 files changed, 13 insertions, 0 deletions
diff --git a/test/Modules/warning-mismatch.m b/test/Modules/warning-mismatch.m
new file mode 100644
index 000000000000..dd7c7f82ec69
--- /dev/null
+++ b/test/Modules/warning-mismatch.m
@@ -0,0 +1,13 @@
+// RUN: rm -rf %t.cache
+// RUN: echo "@import Mismatch;" >%t.m
+// RUN: %clang_cc1 -Wno-system-headers -fdisable-module-hash \
+// RUN:   -fmodules-cache-path=%t.cache -fmodules -fimplicit-module-maps \
+// RUN:   -I%S/Inputs/warning-mismatch %t.m -fsyntax-only
+// RUN: %clang_cc1 -Wsystem-headers -fdisable-module-hash \
+// RUN:   -fmodules-cache-path=%t.cache -fmodules -fimplicit-module-maps \
+// RUN:   -I%S/Inputs/warning-mismatch %s -fsyntax-only
+
+// This testcase triggers a warning flag mismatch in an already validated
+// header.
+@import Mismatch;
+@import System;