--- /dev/null
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -fmodule-cache-path %t -F %S/Inputs %s 2>&1 | FileCheck %s
+
+__import_module__ MutuallyRecursive1;
+
+// FIXME: Lots of redundant diagnostics here, because the preprocessor
+// can't currently tell the parser not to try to load the module again.
+
+// CHECK: MutuallyRecursive2.h:3:19: fatal error: cyclic dependency in module 'MutuallyRecursive1': MutuallyRecursive1 -> MutuallyRecursive2 -> MutuallyRecursive1
+// CHECK: MutuallyRecursive1.h:2:19: fatal error: could not build module 'MutuallyRecursive2'
+// CHECK: cycles.c:4:19: fatal error: could not build module 'MutuallyRecursive1'
+