diff options
| -rw-r--r-- | upb/encode.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/upb/encode.c b/upb/encode.c index 7ec952e..43d24cd 100644 --- a/upb/encode.c +++ b/upb/encode.c @@ -48,7 +48,9 @@ static bool upb_encode_growbuffer(upb_encstate *e, size_t bytes) { CHK(new_buf); /* We want previous data at the end, realloc() put it at the beginning. */ - memmove(new_buf + new_size - old_size, e->buf, old_size); + if (old_size > 0) { + memmove(new_buf + new_size - old_size, e->buf, old_size); + } e->ptr = new_buf + new_size - (e->limit - e->ptr); e->limit = new_buf + new_size; |