HEAD~1 is no longer treated as a valid ref

[neoeinstein]

GitHub repository with your minimal reproducible example

https://github.com/bufbuild/buf/

Commands

buf breaking <URL>#ref=HEAD~1

Output

fatal: invalid refspec 'HEAD~1'

Expected Output

No failures. This worked correctly and as expected in 1.34. Appears related to #3197 and #3215, but with a different appearance.

Anything else?

Is there an alternate formulation we should be using to check against the prior commit on a branch?

[emcfarlane]

This syntax should work. Fixing. An alternative for now is to specify the branch buf breaking --against '.git#branch=main,ref=HEAD~'.

[emcfarlane]

The fix has been released in v1.39.0.