Don't access invalid memory.

PDAL · Mar 18, 2020 · b34de2c · b34de2c
1 parent c4cc229
commit b34de2c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/pdal/util/Utils.cpp b/pdal/util/Utils.cpp
@@ -436,7 +436,7 @@ std::string Utils::escapeJSON(const std::string &str)
     };
     for (std::string::size_type i = 0; i < s.size();)
     {
-        char val = s[i];
+        unsigned char val = s[i];
         if (val < (char)replacements.size())
         {
             s.replace(i, 1, replacements[val]);