[flang] Keep message.cc buildable by g++ 7.2.

Original-commit: flang-compiler/f18@edd311972f1bd0da2df1e373a211babca5fa842f
Reviewed-on: https://github.com/flang-compiler/f18/pull/84
Tree-same-pre-rewrite: false

diff --git a/flang/lib/parser/message.cc b/flang/lib/parser/message.cc
index c620085..4b6a9e6 100644 (file)
--- a/flang/lib/parser/message.cc
+++ b/flang/lib/parser/message.cc
@@ -117,7 +117,8 @@ bool Message::SortBefore(const Message &that) const {
 
 bool Message::IsFatal() const {
   return std::visit(visitors{[](const MessageExpectedText &) { return true; },
-                        [](const auto &x) { return x.isFatal(); }},
+                        [](const MessageFixedText &x) { return x.isFatal(); },
+                        [](const MessageFormattedText &x) { return x.isFatal(); }},
       text_);
 }