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| author |  Johannes Schindelin <johannes.schindelin@gmx.de> | 2020-12-19 14:55:59 +0000 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2020-12-21 14:06:09 -0800 |
| commit | 5c29f19cdada762e75939a946df21b44d48d6fff (patch) | |
| tree | bdc9d8ad8daf17aee9dff42c439c46b74968a342 | |
| parent | t2016: add a NEEDSWORK about the PERL prerequisite (diff) | |
| download | tgif-5c29f19cdada762e75939a946df21b44d48d6fff.tar.xz | |
checkout -p: handle tree arguments correctly again
This fixes a segmentation fault.
The bug is caused by dereferencing `new_branch_info->commit` when it is
`NULL`, which is the case when the tree-ish argument is actually a tree,
not a commit-ish. This was introduced in 5602b500c3c (builtin/checkout:
fix `git checkout -p HEAD...` bug, 2020-10-07), where we tried to ensure
that the special tree-ish `HEAD...` is handled correctly.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | builtin/checkout.c | 6 | ||||
| -rwxr-xr-x | t/t2016-checkout-patch.sh | 5 |
2 files changed, 9 insertions, 2 deletions
diff --git a/builtin/checkout.c b/builtin/checkout.c index 9a33b005cc..728c67e8ca 100644 --- a/builtin/checkout.c +++ b/builtin/checkout.c @@ -479,9 +479,11 @@ static int checkout_paths(const struct checkout_opts *opts, * with the hex of the commit (whether it's in `...` form or * not) for the run_add_interactive() machinery to work * properly. However, there is special logic for the HEAD case - * so we mustn't replace that. + * so we mustn't replace that. Also, when we were given a + * tree-object, new_branch_info->commit would be NULL, but we + * do not have to do any replacement, either. */ - if (rev && strcmp(rev, "HEAD")) + if (rev && new_branch_info->commit && strcmp(rev, "HEAD")) rev = oid_to_hex_r(rev_oid, &new_branch_info->commit->object.oid); if (opts->checkout_index && opts->checkout_worktree) diff --git a/t/t2016-checkout-patch.sh b/t/t2016-checkout-patch.sh index d91a329eb3..abfd586c32 100755 --- a/t/t2016-checkout-patch.sh +++ b/t/t2016-checkout-patch.sh @@ -123,4 +123,9 @@ test_expect_success PERL 'none of this moved HEAD' ' verify_saved_head ' +test_expect_success PERL 'empty tree can be handled' ' + test_when_finished "git reset --hard" && + git checkout -p $(test_oid empty_tree) -- +' + test_done |