1 diff --git i/git-changebar/src/gcb-plugin.c w/git-changebar/src/gcb-plugin.c
2 index f8ce20cd..4488b22f 100644
3 --- i/git-changebar/src/gcb-plugin.c
4 +++ w/git-changebar/src/gcb-plugin.c
5 @@ -216,7 +216,7 @@ static int
6 gcb_git_buf_grow (git_buf *buf,
9 - if (buf->asize == 0) {
10 + if (buf->reserved == 0) {
11 if (target_size == 0) {
12 target_size = buf->size;
14 @@ -234,7 +234,7 @@ buf_zero (git_buf *buf)