`IF empty($List)` is rejected with a code-less, location-less "Unexpected token after expression" — printed AFTER a green `0 errors` verdict

[marclehane-creator]

Found in the agent evaluation (our harness evaluation row 13, corrected finding 9) and
reproduced in isolation on the isolation probe:

CREATE MICROFLOW Bench.Probe_EmptyList ($Customer: Bench.Customer) RETURNS Integer BEGIN
  RETRIEVE $Orders FROM Bench.Order WHERE Bench.Order_Customer = $Customer AND Status = 'Open';
  IF empty($Orders) THEN
    RETURN 0;
  END IF;
  RETURN length($Orders);
END;

check p1-empty.mdl -p MdlBenchFixture.mpr --references prints, in this order:

✓ Syntax OK (1 statements)
…
✓ All references valid
…
1 issues: 0 errors, 0 warnings, 1 info        ← (in the row-13 transcript; a green verdict line)
(no module)
  ✗ Unexpected token after expression — the expression appears incomplete or malformed (possible missing space between keywords). []
      at
      → Check for glued keywords such as 'emptyor' (should be 'empty or') or 'andtrue' (should be 'and true').
1 issues: 1 errors, 0 warnings, 0 info

Exit code 1 — the verdict is correct. Three things are not: (1) the error has an empty code
[], an empty at, and no line number, so a reader (human or model) cannot find it in a 40-line
script; (2) the hint is about glued keywords, which is not the cause — empty is an object test
and the list form is length($List) = 0; (3) a green N issues: 0 errors block can precede it, so
anyone reading the FIRST verdict line records a pass. The eval write-up did exactly that for twelve
hours. Same family as the apostrophe case (reference_mxcli_mdl_authoring_traps): the message is
emitted from the expression re-parser without the statement's position. Ask: attach the document
and line, give it a code, and mention length() in the hint when the token is empty(.

---

mxcli 0.20.0, Mendix 11.12.x, Windows 11. Found while evaluating a self-hosted agent loop that drives check → check --references → exec → mx check; each item above was reproduced on a fresh copy of the fixture or app named.