Fwd: Git credentials not working

[Dimitri Kopriwa <d.kopriwa@gmail.com>]

Dear Git list,


I have tried to used git credentials within Gitlab-CI runners. I have 4 
instance of GitLab and discovered a weird bug with Git credentials when 
use within a CI process.

Please note before all that the time spend allowed me multiple time to 
check that my credentials are valid for the repository. And calling git 
fetch --tags with the full remote url that include the credentials 
always succeeded.

Tested with Git 2.11, 2.19

Git credentials in ~/.git-credentials and ~/.config/git/credentials are 
being removed by git upon reading.

This happen randomly accross my CI runner, and change that make them 
work on not related.


{ Error: Command failed: git fetch --tags 
https://git.example.com/example/some-project.git
18:25:52.554903 git.c:415               trace: built-in: git fetch 
--tags https://git.example.com/example/some-project.git
18:25:52.555234 run-command.c:637       trace: run_command: GIT_DIR=.git 
git-remote-https https://git.example.com/example/some-project.git 
https://git.example.com/example/some-project.git
18:25:52.692741 run-command.c:637       trace: run_command: 'git 
credential-store get'
18:25:52.697314 git.c:659               trace: exec: 
git-credential-store get
18:25:52.697372 run-command.c:637       trace: run_command: 
git-credential-store get
18:25:52.936024 run-command.c:637       trace: run_command: 'git 
credential-store erase'
18:25:52.940307 git.c:659               trace: exec: 
git-credential-store erase
18:25:52.940365 run-command.c:637       trace: run_command: 
git-credential-store erase
remote: HTTP Basic: Access denied
fatal: Authentication failed for 
'https://git.example.com/example/some-project.git/'


See the full question here: 
https://stackoverflow.com/questions/52614467/why-does-git-credential-store-call-git-credential-erase-and-make-my-credential-f


Can you please help me found why is git credential-store erase called ?


Best regards,