Re: Git 2.36, ls-tree submodule regression?

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On Wed, Apr 6, 2022 at 6:29 PM Bryan Turner <bturner@xxxxxxxxxxxxx> wrote:
>
> On Wed, Apr 6, 2022 at 5:34 PM Bryan Turner <bturner@xxxxxxxxxxxxx> wrote:
> >
> > In the test suite for Bitbucket Server, we have a test repository[1]
> > which has a commit that has a .gitmodules file that lists 3
> > submodules, each of which has an entry in the tree with "Subproject
> > commit <SHA>".
> >
> > The submodules aren't fetched (at least one of them doesn't actually
> > exist anywhere to fetch), but running git ls-tree in Git 2.35.1 and
> > prior shows the expected tree data:
> >
> > $ git ls-tree -r -l ecf42d8adc4d7eb4386e37882d053704067712d4: --
> > 100644 blob c0de405f50ea72f9d2b973dd504671ba63ea7189     346 .gitmodules
> > 100644 blob 493021b1c9e0ecfebcd5ebce646a44138bc60b39      20
> > add_file/add_file.txt
> > 100644 blob d8c00a7fe6eb6a00378e103a46e3c472c084a949      25
> > basic_branching/file.txt
> > 100644 blob 927b01c060cf0dc5036e19abeab8e332d9075ea0     167 binary/B.zip
> > 100644 blob 72555d02a139700be930a6734b57c5fab84512b9     167 binary/C.zip
> > 100644 blob 72555d02a139700be930a6734b57c5fab84512b9     167 binary/D.zip
> > 100644 blob 668076c308990933c2df66efb87b946704252486      46
> > branch_mod_merge/file.txt
> > 100644 blob b1d99e581f0bb8138b8997f9268294e41faee05b      33
> > modification/mod_file.txt
> > 100644 blob 46fa903c8af8a92c2714a47ae5a341a99c2ee3b2      18 moved_dir/file.txt
> > 100644 blob f49abb7d6c366e6f83470e36439bc162234d7963      24
> > mv_file/moved_file.txt
> > 100644 blob 2e6b03cbbe90d3c9afcfc98967a5a71b4c9cff1a      66
> > out_of_order/file.txt
> > 160000 commit 0ac826865ce7e8bc76022d49424f52e09b16dc87       -
> > submodule/atlassian-refapp
> > 160000 commit 92b18c97d9d92d2bd02cfd1d268f22fddddafb67       -
> > submodule/bamboo-git-plugin
> > 160000 commit 996b4f5a7e242a29fe573582d98f5174142bb97c       - submodule/stash
> > 120000 blob 4cbb553f3f4ac2ee7b01ff6c951d6bf583c39c15      10 symlink/link.txt
> > 100644 blob 57a3592bb2cf8e76e2faef7660945a2fe0e24360      27 symlink/target.txt
> >
> > The same ls-tree command in 2.36.0-rc0 fails:
> >
> > $ /opt/git/2.36.0-rc0/bin/git ls-tree -r -l
> > ecf42d8adc4d7eb4386e37882d053704067712d4: --
> > 100644 blob c0de405f50ea72f9d2b973dd504671ba63ea7189     346 .gitmodules
> > 100644 blob 493021b1c9e0ecfebcd5ebce646a44138bc60b39      20
> > add_file/add_file.txt
> > 100644 blob d8c00a7fe6eb6a00378e103a46e3c472c084a949      25
> > basic_branching/file.txt
> > 100644 blob 927b01c060cf0dc5036e19abeab8e332d9075ea0     167 binary/B.zip
> > 100644 blob 72555d02a139700be930a6734b57c5fab84512b9     167 binary/C.zip
> > 100644 blob 72555d02a139700be930a6734b57c5fab84512b9     167 binary/D.zip
> > 100644 blob 668076c308990933c2df66efb87b946704252486      46
> > branch_mod_merge/file.txt
> > 100644 blob b1d99e581f0bb8138b8997f9268294e41faee05b      33
> > modification/mod_file.txt
> > 100644 blob 46fa903c8af8a92c2714a47ae5a341a99c2ee3b2      18 moved_dir/file.txt
> > 100644 blob f49abb7d6c366e6f83470e36439bc162234d7963      24
> > mv_file/moved_file.txt
> > 100644 blob 2e6b03cbbe90d3c9afcfc98967a5a71b4c9cff1a      66
> > out_of_order/file.txt
> > 160000 commit 0ac826865ce7e8bc76022d49424f52e09b16dc87       -
> > submodule/atlassian-refapp
> > error: Could not read 0ac826865ce7e8bc76022d49424f52e09b16dc87
> > fatal: Invalid commit 0ac826865ce7e8bc76022d49424f52e09b16dc87 in
> > submodule path submodule/atlassian-refapp
> >
> > Bisecting the error selects:
> >
> > $ git bisect good
> > 9c4d58ff2c385f49585197c8650356955e1fa02e is the first bad commit
> > commit 9c4d58ff2c385f49585197c8650356955e1fa02e
> > Author: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
> > Date:   Wed Mar 23 17:13:15 2022 +0800
> >
> >     ls-tree: split up "fast path" callbacks
> >
> >     Make the various if/else in the callbacks for the "fast path" a lot
> >     easier to read by just using common functions for the parts that are
> >     common, and have per-format callbacks for those parts that are
> >     different.
> >
> >     Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
> >     Signed-off-by: Teng Long <dyroneteng@xxxxxxxxx>
> >     Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
> >
> >  builtin/ls-tree.c | 199 ++++++++++++++++++++++++++++++++++--------------------
> >  1 file changed, 125 insertions(+), 74 deletions(-)
> >
> > (I've CC'd Ævar and Teng on this message.)
>
> Actually, it looks like Ævar might already have a fix up for it in
> [2]. I'll see if I can apply that patch locally and verify it.

Confirmed that what's currently in "next" (which I believe will become
2.36.0-rc1 at some point?) does not manifest this issue.

Thanks for the fix--posted before I could even ask for it--and sorry
for the noise.

Best regards,
Bryan Turner




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