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replay: move onto NULL check before first use

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cmd_replay() aborts if the pointer "onto" is NULL after argument
parsing, e.g. when specifying a non-existing commit with --onto.
15cd4ef1f4 (replay: make atomic ref updates the default behavior,
2025-11-06) added code that dereferences this pointer before the check.
Switch their places to avoid a segmentation fault.

Reported-by: Kristoffer Haugsbakk <kristofferhaugsbakk@fastmail.com>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe
2025-12-11 18:56:54 +01:00
committed by Junio C Hamano
parent 8cb4a11438
commit a4a77e41fa
1 changed files with 3 additions and 3 deletions
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6
builtin/replay.c
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@@ -454,6 +454,9 @@ int cmd_replay(int argc,
determine_replay_mode(repo, &revs.cmdline, onto_name, &advance_name,
&onto, &update_refs);
if (!onto) /* FIXME: Should handle replaying down to root commit */
die("Replaying down to root commit is not supported yet!");
/* Build reflog message */
if (advance_name_opt)
strbuf_addf(&reflog_msg, "replay --advance %s", advance_name_opt);
@@ -472,9 +475,6 @@ int cmd_replay(int argc,
}
}
if (!onto) /* FIXME: Should handle replaying down to root commit */
die("Replaying down to root commit is not supported yet!");
if (prepare_revision_walk(&revs) < 0) {
ret = error(_("error preparing revisions"));
goto cleanup;