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-rw-r--r--contrib/libc++/src/optional.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/contrib/libc++/src/optional.cpp b/contrib/libc++/src/optional.cpp
index f2fbfdfec1ce..2877d175bc1b 100644
--- a/contrib/libc++/src/optional.cpp
+++ b/contrib/libc++/src/optional.cpp
@@ -15,6 +15,10 @@ namespace std
bad_optional_access::~bad_optional_access() _NOEXCEPT = default;
+const char* bad_optional_access::what() const _NOEXCEPT {
+ return "bad_optional_access";
+ }
+
} // std
_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL