From fc982c0177ff34835dc160bf95e87c42603f3c3f Mon Sep 17 00:00:00 2001
From: Protobuf Team Bot <protobuf-github-bot@google.com>
Date: Thu, 11 Jan 2024 09:01:30 -0800
Subject: [PATCH] Fix missing ! making it so untyped_message would trigger a
 invalid Utf8 error IFF the string was _valid_ UTF8.

PiperOrigin-RevId: 597570464
---
 src/google/protobuf/json/internal/untyped_message.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/google/protobuf/json/internal/untyped_message.cc b/src/google/protobuf/json/internal/untyped_message.cc
index ee34a7f215..5e8e5944ee 100644
--- a/src/google/protobuf/json/internal/untyped_message.cc
+++ b/src/google/protobuf/json/internal/untyped_message.cc
@@ -468,7 +468,7 @@ absl::Status UntypedMessage::DecodeDelimited(io::CodedInputStream& stream,
       }
       if (field.proto().kind() == Field::TYPE_STRING) {
         if (desc_->proto().syntax() == google::protobuf::SYNTAX_PROTO3 &&
-            utf8_range::IsStructurallyValid(buf)) {
+            !utf8_range::IsStructurallyValid(buf)) {
           return MakeProto3Utf8Error();
         }
       }