"Uploading files failed!" doesn't fail CI (exit code not 0)

[kubukoz]

Version(s)

1.8.5 (as installed by the github action)

Describe the bug

This happened in CI: I had a publish whose logs end with

Uploading files failed!
Possible causes:
- incorrect Sonatype credentials
- incorrect Sonatype server was used, try 'central-s01'
 -> consult publish subcommand documentation

but the command doesn't actually return a failing exit code, and CI seems to have succeeded.

To Reproduce

Re-running a similar job to https://github.com/polyvariant/smithy-test-tui/actions/runs/17387234481/job/49355628497 should do the trick.

Expected behaviour
A non-zero exit code.