added char cast

should fix the GCC unittest
2018-05-31 16:36:16 +02:00 · 2018-05-31 16:36:16 +02:00 · ecadcdb593
commit ecadcdb593
parent 48656a49f5
1 changed files with 1 additions and 1 deletions
--- a/include/nlohmann/detail/output/serializer.hpp
+++ b/include/nlohmann/detail/output/serializer.hpp
@ -415,7 +415,7 @@ class serializer
        {
            // we finish reading, but do not accept: string was incomplete
            std::string sn(3,'\0');
-            snprintf(&sn[0], sn.size(), "%.2X", s.back());
+            snprintf(&sn[0], sn.size(), "%.2X", static_cast<uint8_t>(s.back()));
            JSON_THROW(type_error::create(316, "incomplete UTF-8 string; last byte: 0x" + sn));
        }
    }