diff --git a/string.c b/string.c index 9fe344a20f..d27c67a948 100644 --- a/string.c +++ b/string.c @@ -1723,7 +1723,7 @@ rb_str_resize(VALUE str, long len) else if (len <= RSTRING_EMBED_LEN_MAX) { char *ptr = RSTRING(str)->as.heap.ptr; STR_SET_EMBED(str); - if (slen > 0) MEMCPY(RSTRING(str)->as.ary, ptr, char, slen); + if (slen > 0) MEMCPY(RSTRING(str)->as.ary, ptr, char, len); RSTRING(str)->as.ary[len] = '\0'; STR_SET_EMBED_LEN(str, len); if (independent) xfree(ptr);