Re: [PATCH] rebase -i: permit 'drop' of a merge commit

> 4c063c82e9 (rebase -i: improve error message when picking merge,
> 2024-05-30) added advice texts for cases when a merge commit is
> passed as argument of sequencer command that cannot operate with
> a merge commit. However, it forgot about the 'drop' command, so
> that in this case the BUG() in the default branch is reached.
> 
> Handle 'drop' like 'merge', i.e., permit it without a message.

> Signed-off-by: Johannes Sixt <j6t@kdbg.org>
> ---
>   sequencer.c                   | 1 +
>   t/t3404-rebase-interactive.sh | 1 +
>   2 files changed, 2 insertions(+)
> 
> diff --git a/sequencer.c b/sequencer.c
> index aaf2e4df64..9ae40a91b2 100644
> --- a/sequencer.c
> +++ b/sequencer.c
> @@ -2720,8 +2720,9 @@ static int check_merge_commit_insn(enum todo_command command)
>   	case TODO_SQUASH:
>   		return error(_("cannot squash merge commit into another commit"));
>   
>   	case TODO_MERGE:
> +	case TODO_DROP:
>   		return 0;
>   
>   	default:
>   		BUG("unexpected todo_command");
> diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
> index 6bac217ed3..34d6ad0770 100755
> --- a/t/t3404-rebase-interactive.sh
> +++ b/t/t3404-rebase-interactive.sh
> @@ -2262,8 +2262,9 @@ rebase_setup_and_clean () {
>   	reword $oid
>   	edit $oid
>   	fixup $oid
>   	squash $oid
> +	drop $oid # acceptable, no advice
>   	EOF
>   	(
>   		set_replace_editor todo &&
>   		test_must_fail git rebase -i HEAD 2>actual