Index: test/CodeGenCXX/castexpr-basepathsize-threshold.cpp
===================================================================
--- test/CodeGenCXX/castexpr-basepathsize-threshold.cpp
+++ test/CodeGenCXX/castexpr-basepathsize-threshold.cpp
@@ -3,6 +3,10 @@
 // https://bugs.llvm.org/show_bug.cgi?id=38356
 // We only check that we do not crash.
 
+// ASAN increases stack usage, so we are hitting stack overflow before reaching
+// recursive template instantiation limit.
+// XFAIL: darwin && asan
+
 template <typename a, a b(unsigned), int c, unsigned...>
 struct d : d<a, b, c - 1> {};
 template <typename a, a b(unsigned), unsigned... e>