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209f8ba7c4
GCC 13 prints the following warning. https://rubyci.s3.amazonaws.com/ubuntu/ruby-master/log/20241127T001003Z.log.html.gz ``` compiling generator.c generator.c: In function ‘raise_generator_error’: generator.c:91:5: warning: function ‘raise_generator_error’ might be a candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format] 91 | VALUE str = rb_vsprintf(fmt, args); | ^~~~~ ``` This change prevents the warning by specifying the format attribute. https://github.com/ruby/json/commit/b8c1490846