"Algorithm container has no name, and there are too many" error lacks the line number

[kvark]

See https://github.com/gpuweb/gpuweb/pull/2162/checks?check_run_id=3805693853

Algorithm container has no name, and there are too many s to choose which to infer a name from.

It's expected for each error to at least point to the place of code where it happens.

[nschonni]

Aside, might be worth adding the repo to https://github.com/tabatkins/bikeshed/blob/main/.github/workflows/update-tests/specs.data