Can't manage to have outs=[] working in a gentest target

[mgraff]

Provided the simplest gentest rule possible:

gentest(
    name = 'test',
    outs = [ "test.log" ],
    test_cmd = "touch ${OUT}",
)

If a try to output some files from this target, I get this error:

error moving outputs for target //:test: rule //:test failed to create output plz-out/tmp/test._build/test.log

The error seems to happen before the test_cmd is executed.
The directory plz-out/tmp/test._build/ exists and the permissions are correct.

The logs, even with the maximum verbosity are helpless.

Do you have any clue ?

[toastwaffle]

The documentation for gentest is just a teeny tiny bit terrible... outs is to be used with cmd for building the test; you probably want test_outputs to have an output from the test command. That error message you're getting there is from the build step rather than the test step.

I think it should be an error to pass outs without cmd or test_outputs without test_cmd