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-rw-r--r--builtin-name-rev.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/builtin-name-rev.c b/builtin-name-rev.c
index c02222436..ef1638590 100644
--- a/builtin-name-rev.c
+++ b/builtin-name-rev.c
@@ -58,7 +58,10 @@ copy_data:
parents = parents->next, parent_number++) {
if (parent_number > 1) {
int len = strlen(tip_name);
- char *new_name = xmalloc(len + 8);
+ char *new_name = xmalloc(len +
+ 1 + decimal_length(generation) + /* ~<n> */
+ 1 + 2 + /* ^NN */
+ 1);
if (len > 2 && !strcmp(tip_name + len - 2, "^0"))
len -= 2;