cmd/cue: stack overflow with cmd "identical" to export

[myitcv]

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

$ cue version
cue version v0.13.0-0.dev.0.20250221114952-15a702eab521

go version go1.24.0
      -buildmode exe
       -compiler gc
  DefaultGODEBUG gotestjsonbuildtext=1,multipathtcp=0,randseednop=0,rsa1024min=0,tlsmlkem=0,x509rsacrt=0,x509usepolicies=0
     CGO_ENABLED 1
          GOARCH arm64
            GOOS linux
         GOARM64 v8.0
             vcs git
    vcs.revision 15a702eab5214e8ee537e74c1ef3c5429a011eca
        vcs.time 2025-02-21T11:49:52Z
    vcs.modified false
cue.lang.version v0.13.0

Does this issue reproduce with the latest release?

Yes

What did you do?

env CUE_EXPERIMENT=evalv3=1
env CUE_DEBUG=openinline=0

# export
exec cue export -e xx
cmp stdout stdout.golden

# cmd
exec cue cmd other
cmp stdout stdout.golden

-- x.cue --
package site

xx: {
	for _, cmd in (command & {siteCueVersionLabels: []}).cue {
		"page.cue": Contents: "test"
	}
}

command: {
	siteCueVersionLabels: _

	cue: {
		[or(tags.cue.modules)]: tagSet: modules: _
	}
	tags: "cue": [_]: [...or([for command, _ in cue {command}])]
	tags: cue: {
		modules: [
			"cue",
		]
	}
}

-- x_tool.cue --
package site

import (
	"encoding/json"
	"tool/cli"
)

command: other: cli.Print & {
	text: json.Marshal(xx)
}

-- stdout.golden --
{}

What did you expect to see?

Passing test

What did you see instead?

Stack overflow in cue cmd call:

# export (0.054s)
# cmd (2.168s)
> exec cue cmd other
[stderr]
runtime: goroutine stack exceeds 1000000000-byte limit
runtime: sp=0x4022580360 stack=[0x4022580000, 0x4042580000]
fatal error: stack overflow

runtime stack:
runtime.throw({0xbb1fbb?, 0x0?})
        /home/myitcv/gos/src/runtime/panic.go:1096 +0x38 fp=0xffffede51670 sp=0xffffede51640 pc=0x89ca8
runtime.newstack()
        /home/myitcv/gos/src/runtime/stack.go:1107 +0x45c fp=0xffffede517b0 sp=0xffffede51670 pc=0x6e28c
runtime.morestack()
        /home/myitcv/gos/src/runtime/asm_arm64.s:342 +0x70 fp=0xffffede517b0 sp=0xffffede517b0 pc=0x8f9b0

goroutine 1 gp=0x40000021c0 m=0 mp=0x14610a0 [running]:
cuelang.org/go/internal/core/adt.(*FieldReference).resolve(0x400111c710, 0x4002540d20, 0x210302)
        /home/myitcv/dev/cuelang/cue/internal/core/adt/expr.go:760 +0x84 fp=0x4022580360 sp=0x4022580360 pc=0x305f04
cuelang.org/go/internal/core/adt.(*OpContext).unifyNode(0x4002540d20, {0xd6a920, 0x400111c710}, 0x210302)
        /home/myitcv/dev/cuelang/cue/internal/core/adt/context.go:817 +0x164 fp=0x4022580420 sp=0x4022580360 pc=0x2e1594
cuelang.org/go/internal/core/adt.(*OpContext).node(0x4002540d20, {0xd62880, 0x40024acb60}, {0xd6a920, 0x400111c710}, 0x1, 0x0?)
        /home/myitcv/dev/cuelang/cue/internal/core/adt/context.go:1064 +0x88 fp=0x40225804f0 sp=0x4022580420 pc=0x2e3338
cuelang.org/go/internal/core/adt.(*SelectorExpr).resolve(0x40024acb60, 0x4002540d20, 0x210302)
        /home/myitcv/dev/cuelang/cue/internal/core/adt/expr.go:1038 +0x6c fp=0x4022580540 sp=0x40225804f0 pc=0x306e2c
cuelang.org/go/internal/core/adt.(*OpContext).unifyNode(0x4002540d20, {0xd6aa20, 0x40024acb60}, 0x210302)
        /home/myitcv/dev/cuelang/cue/internal/core/adt/context.go:817 +0x164 fp=0x4022580600 sp=0x4022580540 pc=0x2e1594
cuelang.org/go/internal/core/adt.(*OpContext).node(0x4002540d20, {0xd62880, 0x40024acb80}, {0xd6aa20, 0x40024acb60}, 0x1, 0x0?)
        /home/myitcv/dev/cuelang/cue/internal/core/adt/context.go:1064 +0x88 fp=0x40225806d0 sp=0x4022580600 pc=0x2e3338
cuelang.org/go/internal/core/adt.(*SelectorExpr).resolve(0x40024acb80, 0x4002540d20, 0x7fff0405)
        /home/myitcv/dev/cuelang/cue/internal/core/adt/expr.go:1038 +0x6c fp=0x4022580720 sp=0x40225806d0 pc=0x306e2c
cuelang.org/go/internal/core/adt.(*OpContext).resolveState(0x4002540d20, {0x4009727f60, {0xd62880, 0x40024acb80}, {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...}}, ...)
        /home/myitcv/dev/cuelang/cue/internal/core/adt/context.go:410 +0x10c fp=0x4022580820 sp=0x4022580720 pc=0x2dea6c
cuelang.org/go/internal/core/adt.(*OpContext).Resolve(0x1270200?, {0x4009727f60, {0xd62880, 0x40024acb80}, {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...}}, ...)
        /home/myitcv/dev/cuelang/cue/internal/core/adt/context.go:404 +0x94 fp=0x4022580890 sp=0x4022580820 pc=0x2de8e4
cuelang.org/go/internal/core/dep.(*visitor).markResolver(0x4002529680, 0x4009727f60, {0xd672c0, 0x40024acb80})
        /home/myitcv/dev/cuelang/cue/internal/core/dep/dep.go:363 +0x124 fp=0x4022580980 sp=0x4022580890 pc=0x337474
cuelang.org/go/internal/core/dep.(*visitor).markExpr(0x4002529680, 0x4009727f60, {0xffff48312118?, 0x40024acb80})
        /home/myitcv/dev/cuelang/cue/internal/core/dep/dep.go:285 +0x320 fp=0x4022580a30 sp=0x4022580980 pc=0x336960
cuelang.org/go/internal/core/dep.(*visitor).markExpr(0x4002529680, 0x4009727f60, {0xd68b50?, 0x40024c0540})
        /home/myitcv/dev/cuelang/cue/internal/core/dep/dep.go:315 +0x428 fp=0x4022580ae0 sp=0x4022580a30 pc=0x336a68
cuelang.org/go/internal/core/dep.(*visitor).markDecl(0x4002529680, 0x4009727f60, {0xd658a0?, 0x40024c0570})
        /home/myitcv/dev/cuelang/cue/internal/core/dep/dep.go:633 +0x270 fp=0x4022580b40 sp=0x4022580ae0 pc=0x338ac0
cuelang.org/go/internal/core/dep.(*visitor).markExpr(0x4002529680, 0x4002539b40, {0xd68298?, 0x400200f050})
        /home/myitcv/dev/cuelang/cue/internal/core/dep/dep.go:350 +0xbfc fp=0x4022580bf0 sp=0x4022580b40 pc=0x33723c
cuelang.org/go/internal/core/dep.(*visitor).markInternalResolvers.(*visitor).markConjuncts.func2({0x4002539b40, {0xd627e0, 0x40024acba0}, {0x0, 0x400255d560, 0x0, 0x0, 0x0, 0x0, {0x0, ...}}})
        /home/myitcv/dev/cuelang/cue/internal/core/dep/dep.go:545 +0xa0 fp=0x4022580c50 sp=0x4022580bf0 pc=0x3382f0
cuelang.org/go/internal/core/adt.VisitConjuncts({0x4002562440?, 0x31?, 0x0?}, 0x4022580e78)
...

[mvdan]

Note that this may be related to #3743. While this one uses cue cmd and that one uses export, the stack traces look pretty similar, and they both involve internal/core/dep.