Fix memory error on str_buf_cat
Modify from nofree to embed string
MODIFY
src/string.c
src/string.c
@@ -695,14 +695,21 @@ mrb_str_modify(mrb_state *mrb, struct RString *s)
}
if (RSTR_NOFREE_P(s)) {
char *p = s->as.heap.ptr;
+ mrb_int len = s->as.heap.len;
- s->as.heap.ptr = (char *)mrb_malloc(mrb, (size_t)s->as.heap.len+1);
+ RSTR_UNSET_NOFREE_FLAG(s);
+ if (len < RSTRING_EMBED_LEN_MAX) {
+ RSTR_SET_EMBED_FLAG(s);
+ RSTR_SET_EMBED_LEN(s, len);
+ }
+ else {
+ s->as.heap.ptr = (char *)mrb_malloc(mrb, (size_t)len+1);
+ s->as.heap.aux.capa = len;
+ }
if (p) {
- memcpy(RSTR_PTR(s), p, s->as.heap.len);
+ memcpy(RSTR_PTR(s), p, len);
}
- RSTR_PTR(s)[s->as.heap.len] = '\0';
- s->as.heap.aux.capa = s->as.heap.len;
- RSTR_UNSET_NOFREE_FLAG(s);
+ RSTR_PTR(s)[len] = '\0';
return;
}
}

Fix memory error on str_buf_cat

Modify from nofree to embed string