1 files changed, 20 insertions, 0 deletions
diff --git a/test/Misc/serialized-diags-driver.c b/test/Misc/serialized-diags-driver.c
new file mode 100644
index 0000000000000..ad07d666c8c12
--- /dev/null
+++ b/test/Misc/serialized-diags-driver.c
@@ -0,0 +1,20 @@
+// Test that the driver correctly combines its own diagnostics with CC1's in the
+// serialized diagnostics. To test this, we need to trigger diagnostics from
+// both processes, so we compile code that has a warning (with an associated
+// note) and then force the driver to crash. We compile stdin so that the crash
+// doesn't litter the user's system with preprocessed output.
+
+// RUN: rm -f %t
+// RUN: %clang -Wx-unknown-warning -Wall -fsyntax-only --serialize-diagnostics %t.diag %s
+// RUN: c-index-test -read-diagnostics %t.diag 2>&1 | FileCheck %s
+
+// CHECK: warning: unknown warning option '-Wx-unknown-warning' [-Wunknown-warning-option] []
+
+// CHECK: warning: variable 'voodoo' is uninitialized when used here [-Wuninitialized]
+// CHECK: note: initialize the variable 'voodoo' to silence this warning []
+// CHECK: Number of diagnostics: 2
+
+void foo() {
+  int voodoo;
+  voodoo = voodoo + 1;
+}