cue cmd not failing on missing task type

[JensRantil]

What version of CUE are you using (cue version)?

$ cue version
cue version (devel)

CUE language version v0.15.1

Go version go1.25.4
      -buildmode exe
       -compiler gc
       -trimpath true
  DefaultGODEBUG containermaxprocs=0,decoratemappings=0,tlssha1=1,updatemaxprocs=0,x509sha256skid=0
     CGO_ENABLED 1
          GOARCH arm64
            GOOS darwin
         GOARM64 v8.0

Does this issue reproduce with the latest stable release?

Yes.

What did you do?

I put the following content in fixup_tool.cue:

package maklare

import "tool/cli"

command: testdata: {
    mkdirInputs: cli.Mkdir & {
        path: "input"
    }
}

I execute cue cmd testdata and the output is command.testdata: no tasks found.

What did you expect to see?

I expected to see an error telling me the cli.Mkdir can't be found (it should be file.Mkdir). I spent a fair amount of time debugging this. 😅

What did you see instead?

I get the output command.testdata: no tasks found - and particularly no error message that cli.Mkdir can't be found.