diff options
| -rw-r--r-- | src/string.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/string.c b/src/string.c index c5efd779f..e382b470c 100644 --- a/src/string.c +++ b/src/string.c @@ -2566,15 +2566,15 @@ mrb_str_cat(mrb_state *mrb, mrb_value str, const char *ptr, size_t len) mrb_raise(mrb, E_ARGUMENT_ERROR, "string size too big"); } if (capa <= total) { - while (total > capa) { + while (capa <= total) { if (capa <= MRB_INT_MAX / 2) { capa *= 2; } else { - capa = total; + capa = total+1; } } - if (capa < total || capa > MRB_INT_MAX) { + if (capa <= total || capa > MRB_INT_MAX) { goto size_error; } resize_capa(mrb, s, capa); |