Uploading throws an error

[YalesRios]

When using the command
check50 liv-ac-uk/COMP108/2020-21/A1

check50 outputs the following:

Connecting.......
Authenticating.....
GitHub username: YalesRios
GitHub password:
Verifying......
Preparing.................
Uploading.....
Traceback (most recent call last):
  File "/usr/local/bin/check50", line 33, in <module>
    sys.exit(load_entry_point('check50==3.2.0', 'console_scripts', 'check50')())
  File "/usr/local/lib/python3.9/site-packages/check50/__main__.py", line 336, in main
    commit_hash = lib50.push("check50", internal.slug, internal.CONFIG_LOADER, data={"check50": True})[1]
  File "/usr/local/lib/python3.9/site-packages/lib50/_api.py", line 73, in push
    username, commit_hash = upload(slug, user, tool, data)
  File "/usr/local/lib/python3.9/site-packages/lib50/_api.py", line 354, in upload
    _run(git("commit -m {msg} --allow-empty", msg=commit_message))
  File "/usr/local/lib/python3.9/site-packages/lib50/_api.py", line 704, in _run
    command_output = child.read().strip().replace("\r\n", "\n")
  File "/usr/local/lib/python3.9/contextlib.py", line 124, in __exit__
    next(self.gen)
  File "/usr/local/lib/python3.9/site-packages/lib50/_api.py", line 697, in _spawn
    raise Error()
lib50._errors.Error
Sorry, something is wrong! check50 ran into an error.
Please let CS50 know by emailing the error above to sysadmins@cs50.harvard.edu.

However, that does not happen when using the --local flag, like so:
check50 --local liv-ac-uk/COMP108/2020-21/A1

In that case the check proceeds as normal.

This problem is present when using CS50 IDE terminal and also my own system.

[Jelleas]

I'm having some trouble replicating this issue for myself:

/Projects/foo/ λ check50 liv-ac-uk/COMP108/2020-21/A1
Connecting.....
Authenticating....
GitHub username: Jelleas
GitHub password: 
Verifying............
Preparing.....
Uploading.............
Waiting for results..................................
Results for liv-ac-uk/comp108/2020-21/A1 generated by check50 v3.1.2
:( Attempt exists
    COMP108A1Paging.java not found

From the stack trace you shared, it looks to be a git commit that is failing somehow:

_run(git("commit -m {msg} --allow-empty", msg=commit_message))

But for reasons unknown!

Could you try running check50 --log-level debug liv-ac-uk/COMP108/2020-21/A1? This should hopefully tell us why git is failing to commit.

[YalesRios]

Here is the output for

check50 --log-level debug liv-ac-uk/COMP108/2020-21/A1:

Connecting...
(DEBUG) db931eea90b1e95423bf90d657a37051f7c45432        refs/heads/2020-21
Authenticating...
(INFO) git credential fill
GitHub username: YalesRios
GitHub password:
(INFO) git -c credentialcache.ignoresighup=true credential approve
Verifying...
(INFO) git clone --bare https://YalesRios@github.com/me50/YalesRios .git
(DEBUG) Cloning into bare repository '.git'...
(DEBUG) remote: Enumerating objects: 9, done.
remote: Counting objects:  11% (1/9)
remote: Counting objects: 100% (9/9)
(DEBUG) remote: Counting objects: 100% (9/9), done.
remote: Compressing objects: 100% (6/6), done.
(DEBUG) remote: Total 9 (delta 1), reused 6 (delta 1), pack-reused 0
(DEBUG) Unpacking objects:  11% (1/9)
(DEBUG) Unpacking objects:  22% (2/9)
(DEBUG) Unpacking objects:  33% (3/9)
(DEBUG) Unpacking objects:  44% (4/9)
(DEBUG) Unpacking objects:  55% (5/9)
(DEBUG) Unpacking objects:  66% (6/9)
(DEBUG) Unpacking objects:  77% (7/9)
(DEBUG) Unpacking objects:  88% (8/9)
Unpacking objects: 100% (9/9), 3.37 KiB | 3.37 MiB/s, done.
Preparing...
(INFO) git config --bool core.bare false
(INFO) git config --path core.worktree /tmp/tmptvbovtyp
(INFO) git checkout --force liv-ac-uk/comp108/2020-21/A1 .gitattributes
(DEBUG) error: pathspec 'liv-ac-uk/comp108/2020-21/A1' did not match any file(s) known to git
error: pathspec '.gitattributes' did not match any file(s) known to git
(DEBUG) git -C /tmp/tmptvbovtyp checkout --force liv-ac-uk/comp108/2020-21/A1 .gitattributes exited with 1
(INFO) git config user.email YalesRios@users.noreply.github.com
(INFO) git config user.name YalesRios
(INFO) git symbolic-ref HEAD refs/heads/liv-ac-uk/comp108/2020-21/A1
(INFO) git add -f COMP108A1PagingApp.java COMP108A1Output.java COMP108A1Paging.java
Uploading...
(INFO) git commit -m 'automated commit by check50 [check50=True]' --allow-empty
(DEBUG) fatal: cannot lock ref 'HEAD': 'refs/heads/liv-ac-uk/comp108/2020-21' exists; cannot create 'refs/heads/liv-ac-uk/comp108/2020-21/A1'
(DEBUG) git -C /tmp/tmptvbovtyp commit -m 'automated commit by check50 [check50=True]' --allow-empty exited with 128
Traceback (most recent call last):
  File "/usr/local/bin/check50", line 33, in <module>
    sys.exit(load_entry_point('check50==3.2.0', 'console_scripts', 'check50')())
  File "/usr/local/lib/python3.9/site-packages/check50/__main__.py", line 336, in main
    commit_hash = lib50.push("check50", internal.slug, internal.CONFIG_LOADER, data={"check50": True})[1]
  File "/usr/local/lib/python3.9/site-packages/lib50/_api.py", line 73, in push
    username, commit_hash = upload(slug, user, tool, data)
  File "/usr/local/lib/python3.9/site-packages/lib50/_api.py", line 354, in upload
    _run(git("commit -m {msg} --allow-empty", msg=commit_message))
  File "/usr/local/lib/python3.9/site-packages/lib50/_api.py", line 704, in _run
    command_output = child.read().strip().replace("\r\n", "\n")
  File "/usr/local/lib/python3.9/contextlib.py", line 124, in __exit__
    next(self.gen)
  File "/usr/local/lib/python3.9/site-packages/lib50/_api.py", line 697, in _spawn
    raise Error()
lib50._errors.Error
Sorry, something is wrong! check50 ran into an error.
Please let CS50 know by emailing the error above to sysadmins@cs50.harvard.edu.

I've noticed your check50 output says generated by check50 v3.1.2 while the version on CS50 IDE is 3.2.0.

[kzidane]

@YalesRios I think the reason this is failing is because you have a branch in your me50/YalesRios repo called liv-ac-uk/comp108/2020-21 already, which is a prefix of liv-ac-uk/COMP108/2020-21/A1 and git doesn't allow branches to be prefixes of other branches. You can get around this by renaming either branch such that none of them is a prefix of any other branch or simply deleting the prefix branch.

I've gone ahead and renamed the branch for you to old/liv-ac-uk/COMP108/2020-21/A1, so I think you should be able to run check50 now without any issues.

@Jelleas thoughts on how to address this better? Maybe a better error message and offer to rename? Would that break anything?

[Jelleas]

@kzidane agree, we can do better here. Would just need to check for a prefix-branch, and warn and exit. Anyway, this would live in lib50, so let me just open up an issue there and link this :)

[vinislima]

Hey guys, I couldn't get the Caesar problem from set02 - Intro to CS to verify. Whenever I tried to test it remotely, it was giving me an error. Checked the check50 manual and found out you can install it locally and test it that way by adding the --local flag after check50. It worked for me and I submitted it. Seems like a good workaround.