[BUG] b4: assertion error with `b4 send`

[BUG] b4: assertion error with `b4 send`

[Andreas Hindborg]

Hi,

I got this assertion error when sending patches today:

---
Sent 11 messages
Tagging sent/20250305-unique-ref-29fcd675f9e9-v17
Recording series message-id in cover letter tracking
Created new revision v18
Updating cover letter with templated changelog entries.
Invoking git-filter-repo to update the cover letter.
New history written in 0.06 seconds...
Traceback (most recent call last):
  File "/nix/store/rnbga7cjzjihq8qayhm2fdpq18g49dwm-b4-0.15.2/bin/.b4-wrapped", line 9, in <module>
    sys.exit(cmd())
             ~~~^^
  File "/nix/store/rnbga7cjzjihq8qayhm2fdpq18g49dwm-b4-0.15.2/lib/python3.13/site-packages/b4/command.py", line 512, in cmd
    cmdargs.func(cmdargs)
    ~~~~~~~~~~~~^^^^^^^^^
  File "/nix/store/rnbga7cjzjihq8qayhm2fdpq18g49dwm-b4-0.15.2/lib/python3.13/site-packages/b4/command.py", line 95, in cmd_send
    b4.ez.cmd_send(cmdargs)
    ~~~~~~~~~~~~~~^^^^^^^^^
  File "/nix/store/rnbga7cjzjihq8qayhm2fdpq18g49dwm-b4-0.15.2/lib/python3.13/site-packages/b4/ez.py", line 2352, in cmd_send
    reroll(mybranch, tag_msg, cl_msgid)
    ~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/nix/store/rnbga7cjzjihq8qayhm2fdpq18g49dwm-b4-0.15.2/lib/python3.13/site-packages/b4/ez.py", line 2491, in reroll
    store_cover(new_cover, tracking)
    ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
  File "/nix/store/rnbga7cjzjihq8qayhm2fdpq18g49dwm-b4-0.15.2/lib/python3.13/site-packages/b4/ez.py", line 749, in store_cover
    run_frf(frf)
    ~~~~~~~^^^^^
  File "/nix/store/rnbga7cjzjihq8qayhm2fdpq18g49dwm-b4-0.15.2/lib/python3.13/site-packages/b4/ez.py", line 157, in run_frf
    frf.run()
    ~~~~~~~^^
  File "/nix/store/xl7fx5x8g52g03npg1dpjzvaiijpv98z-python3.13-git-filter-repo-2.47.0/lib/python3.13/site-packages/git_filter_repo.py", line 4936, in run
    self._record_metadata(self.results_tmp_dir(), self._orig_refs)
    ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/nix/store/xl7fx5x8g52g03npg1dpjzvaiijpv98z-python3.13-git-filter-repo-2.47.0/lib/python3.13/site-packages/git_filter_repo.py", line 4767, in _record_metadata
    self._compute_metadata(metadata_dir, orig_refs)
    ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/nix/store/xl7fx5x8g52g03npg1dpjzvaiijpv98z-python3.13-git-filter-repo-2.47.0/lib/python3.13/site-packages/git_filter_repo.py", line 4712, in _compute_metadata
    assert(usoa == intermediate) # old wasn't pruned => usoa == intermediate


It looks like everything is OK and b4 set up for the next spin, cover
letter looks right.

I observed this on nixos first with b4 0.14.3 via nixpkgs 25.05, then
upgraded to 0.15.2 via nixpkgs unstable.

Best regards,
Andreas

Re: [BUG] b4: assertion error with `b4 send`

[Konstantin Ryabitsev]

On Thu, Jun 04, 2026 at 10:23:39PM +0200, Andreas Hindborg wrote:
> Hi,
> 
> I got this assertion error when sending patches today:
> 
> ---
> Sent 11 messages
> Tagging sent/20250305-unique-ref-29fcd675f9e9-v17
> Recording series message-id in cover letter tracking
> Created new revision v18
> Updating cover letter with templated changelog entries.
> Invoking git-filter-repo to update the cover letter.
> New history written in 0.06 seconds...

[...]

>   File "/nix/store/xl7fx5x8g52g03npg1dpjzvaiijpv98z-python3.13-git-filter-repo-2.47.0/lib/python3.13/site-packages/git_filter_repo.py", line 4767, in _record_metadata
>     self._compute_metadata(metadata_dir, orig_refs)
>     ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
>   File "/nix/store/xl7fx5x8g52g03npg1dpjzvaiijpv98z-python3.13-git-filter-repo-2.47.0/lib/python3.13/site-packages/git_filter_repo.py", line 4712, in _compute_metadata
>     assert(usoa == intermediate) # old wasn't pruned => usoa == intermediate

Looks like this tripped something in git-filter-repo, so not something we
control anyway.

> It looks like everything is OK and b4 set up for the next spin, cover
> letter looks right.

Yes, looks like it was during some kind of cleanup.

> I observed this on nixos first with b4 0.14.3 via nixpkgs 25.05, then
> upgraded to 0.15.2 via nixpkgs unstable.

We actually got rid of git-filter-repo in the latest master, so I'm just going
to blame this on gremlins and blame the alignment of the celestial spheres. :)

-K

Re: [BUG] b4: assertion error with `b4 send`

[Andreas Hindborg]

Konstantin Ryabitsev <konstantin@linuxfoundation.org> writes:

> On Thu, Jun 04, 2026 at 10:23:39PM +0200, Andreas Hindborg wrote:
>> Hi,
>> 
>> I got this assertion error when sending patches today:
>> 
>> ---
>> Sent 11 messages
>> Tagging sent/20250305-unique-ref-29fcd675f9e9-v17
>> Recording series message-id in cover letter tracking
>> Created new revision v18
>> Updating cover letter with templated changelog entries.
>> Invoking git-filter-repo to update the cover letter.
>> New history written in 0.06 seconds...
>
> [...]
>
>>   File "/nix/store/xl7fx5x8g52g03npg1dpjzvaiijpv98z-python3.13-git-filter-repo-2.47.0/lib/python3.13/site-packages/git_filter_repo.py", line 4767, in _record_metadata
>>     self._compute_metadata(metadata_dir, orig_refs)
>>     ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
>>   File "/nix/store/xl7fx5x8g52g03npg1dpjzvaiijpv98z-python3.13-git-filter-repo-2.47.0/lib/python3.13/site-packages/git_filter_repo.py", line 4712, in _compute_metadata
>>     assert(usoa == intermediate) # old wasn't pruned => usoa == intermediate
>
> Looks like this tripped something in git-filter-repo, so not something we
> control anyway.
>
>> It looks like everything is OK and b4 set up for the next spin, cover
>> letter looks right.
>
> Yes, looks like it was during some kind of cleanup.
>
>> I observed this on nixos first with b4 0.14.3 via nixpkgs 25.05, then
>> upgraded to 0.15.2 via nixpkgs unstable.
>
> We actually got rid of git-filter-repo in the latest master, so I'm just going
> to blame this on gremlins and blame the alignment of the celestial spheres. :)

Ok, cool, I'm going to pull down that and see what happens.


Best regards,
Andreas Hindborg