Wrong pool data length for negative floating value in a mrb file.
MODIFY
src/fmt_fp.c
src/fmt_fp.c
@@ -379,7 +379,7 @@ mrb_float_to_str(mrb_state *mrb, mrb_value flo, const char *fmt)
mrb_value
mrb_float_to_str(mrb_state *mrb, mrb_value flo, const char *fmt)
{
- char buf[24];
+ char buf[25];
snprintf(buf, sizeof(buf), fmt, mrb_float(flo));
return mrb_str_new_cstr(mrb, buf);

Wrong pool data length for negative floating value in a mrb file.