cue/load: using qualifier that is the same as final path element causes import failure

[rogpeppe]

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

a90aec5c611bda3d73dfe484d4794e07499ff2ae

Does this issue reproduce with the latest stable release?

Yes (at v0.8.2)

What did you do?

# old
env CUE_EXPERIMENT=modules=0
exec cue vet -c .

# new
env CUE_EXPERIMENT=modules
exec cue vet -c .

-- cue.mod/module.cue --
module: "github.com/foo/bar"
language: {
	version: "v0.9.0"
}
-- bar.cue --
package bar

import xxx "github.com/foo/bar/abc:abc"

z: xxx.x & 123

-- abc/baz.cue --
package abc

x: 123

What did you expect to see?

A passing test

What did you see instead?

# old (0.023s)
# new (0.011s)
> env CUE_EXPERIMENT=modules
> exec cue vet -c .
[stderr]
github.com/foo/bar@v0: import failed: no dependency found for package "github.com/foo/bar/abc":
    ./bar.cue:3:8
[exit status 1]
FAIL: /tmp/testscript3893947838/repro.txtar/script.txtar:7: unexpected command failure

[myitcv]

It was ambiguous which vet call had failed, so I've updated the original description.

@rogpeppe - to confirm we will fix this as part of the work in #3155?

[rogpeppe]

It was ambiguous which vet call had failed, so I've updated the original description.

@rogpeppe - to confirm we will fix this as part of the work in #3155?

The fix is actually independent of that, but I have a fix and it will land at or around the same time.