CREATE WORKFLOW with user task panics — nil pointer dereference

[retran]

Impact

CRITICAL. Any CREATE WORKFLOW containing a user task activity crashes the process with a nil pointer dereference. Blocks all workflow creation that includes user tasks.

Details

Field	Value
Severity	Critical
Panic location	visitor_workflow.go:420 in buildWorkflowUserTask
Working activities	call microflow, decision
Broken activity	user task

• Simple workflows without user tasks work fine.
• DESCRIBE of existing user-task workflows produces correct output.
• Only the CREATE path is broken.

Reproduction

create workflow Module."WF_Test"
  parameter $WorkflowContext: Module."Entity"
  display 'Test'
begin
  user task "ut1" 'Review'
    page Module."Page"
  outcomes
    'Approve' { }
    'Reject' { };
end workflow;

Expected

Workflow created without panic.

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Discovered during AI-assisted manual testing session (2026-04-29, mxcli v0.7.0-257-ga07e7e0).

[github-actions]

Issue Triage

Summary:
Creating a workflow that includes a user task activity causes mxcli to panic with a nil‑pointer dereference.

Checklist for bug report completeness

Required info	Present?	Notes
mxcli version	✅	v0.7.0-257-ga07e7e0
Mendix version	❌	Not specified
Scenario (what was tried)	✅	MDL script for CREATE WORKFLOW with a user task
Expected output	✅	Workflow created without panic
Experienced output	✅	Panic/nil‑pointer dereference at visitor_workflow.go:420
AI bug report (diag bundle or session log)	❌	Only mentioned as “AI‑assisted manual testing session”; no log or bundle attached

What’s missing:

• The Mendix version of the project you were processing.
• The output of mxcli diag --bundle (or at least the session log) from the run that triggered the panic.

Could you please add those details? Once we have them we’ll be able to investigate the nil‑pointer issue more quickly. Thanks for reporting!

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Automated triage via OpenRouter — workflow source