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string.c: expand heap

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* string.c (str_buf_cat): expand the heap buffer at making
  str independent, not only just copying.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50336 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2015-04-17 03:26:21 +00:00
parent b8858232f2
commit b3626b3ee7
1 changed files with 1 additions and 1 deletions
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string.c
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@ -2194,7 +2194,7 @@ str_buf_cat(VALUE str, const char *ptr, long len)
if (ptr >= sptr && ptr <= sptr + olen) {
off = ptr - sptr;
}
rb_str_modify(str);
rb_str_modify_expand(str, len);
if (len == 0) return 0;
if (STR_EMBED_P(str)) {
capa = RSTRING_EMBED_LEN_MAX;