numread_error    2220 src/number.c   static ScmObj numread_error(const char *msg, struct numread_packet *context);
numread_error    2469 src/number.c                   return numread_error("(exact non-integral rational number is not supported)",
numread_error    2488 src/number.c               return numread_error("(only 10-based fraction is supported)",
numread_error    2523 src/number.c                       return numread_error("(exponent of floating-point number out of range)", ctx);
numread_error    2547 src/number.c                   return numread_error("(exact non-integral number is not supported)",
numread_error    2572 src/number.c               return numread_error("(exact complex number is not supported)", \