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-rw-r--r--clang/test/Modules/Inputs/MutuallyRecursive1.framework/Headers/MutuallyRecursive1.h3
-rw-r--r--clang/test/Modules/Inputs/MutuallyRecursive2.framework/Headers/MutuallyRecursive2.h6
-rw-r--r--clang/test/Modules/cycles.c12
3 files changed, 21 insertions, 0 deletions
diff --git a/clang/test/Modules/Inputs/MutuallyRecursive1.framework/Headers/MutuallyRecursive1.h b/clang/test/Modules/Inputs/MutuallyRecursive1.framework/Headers/MutuallyRecursive1.h
new file mode 100644
index 00000000000..2a8282cc011
--- /dev/null
+++ b/clang/test/Modules/Inputs/MutuallyRecursive1.framework/Headers/MutuallyRecursive1.h
@@ -0,0 +1,3 @@
+
+__import_module__ MutuallyRecursive2;
+
diff --git a/clang/test/Modules/Inputs/MutuallyRecursive2.framework/Headers/MutuallyRecursive2.h b/clang/test/Modules/Inputs/MutuallyRecursive2.framework/Headers/MutuallyRecursive2.h
new file mode 100644
index 00000000000..98008533f30
--- /dev/null
+++ b/clang/test/Modules/Inputs/MutuallyRecursive2.framework/Headers/MutuallyRecursive2.h
@@ -0,0 +1,6 @@
+
+
+__import_module__ MutuallyRecursive1;
+
+
+
diff --git a/clang/test/Modules/cycles.c b/clang/test/Modules/cycles.c
new file mode 100644
index 00000000000..8e3e9c63161
--- /dev/null
+++ b/clang/test/Modules/cycles.c
@@ -0,0 +1,12 @@
+// 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'
+
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