Investigate "failed to fill whole buffer" when updating the workspace

[Byron]

From Discord

Hello, I've an issue that appeared today in GitButler, I cannot update the workspace with upstream commits anymore, it fails with the message: failed to fill whole buffer. I've try to make it forget the workspace, delete all the gitbutler/ branches, login again to GitHub but it does not work, I can't integrate upstream changes anymore.

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As fetches are performed using the Git command-line, we can probably assume that this works as expected. Hence, the failed to fill whole buffer seems to come from Rust code trying to stream data using std::io::Read.

The question is where that happens, and if it happens when reading objects.
We should be able to learn more about it by launching GitButler from the terminal, configured to print a backtrace and with detailed logging.

RUST_BACKTRACE=1 LOG_LEVEL=debug /Applications/GitButler\ Nightly.app/Contents/MacOS/gitbutler-tauri

[Byron]

It seems that updating the workspace is indeed a way to produce this issue, see this discord message.