Apparently Windows does not handle 'long' the same as Unix.

src/Parser/Lexer.cpp

@@ -154,7 +154,7 @@ namespace Porygon::Parser {
     }
 
     Token *Lexer::LexNumber(char16_t c) {
-        long int_value = CharToInt(c);
+        int64_t int_value = CharToInt(c);
         double float_value = 0;
         short decimal_index = 0;
         bool has_point = false;