Implicit-Self method call loses to a same-name plain proc from a used unit

• Type: bug (name resolution — FPC scoping) — Track A
• Status: backlog
• Opened: 2026-07-02, exposed by the Move/FillChar builtin sweep; verified pre-existing at v144 (rebuilt that compiler from git: same failure, so unrelated to the v145+ Move work).

Symptom

Inside a method, a bare call to another method of the same class resolves to a same-name PLAIN PROC from a usesd unit instead of the class's own method:

examples/adventure/engine.pas:1038 — Move(d) inside a TGame method, with TGame.Move(d: TDirection) declared, but uses sysutils (which still has the 3-arg Move) → no overload of Move matches these arguments / Mismatch in MatchProcCall: name = Move, nArgs = 1; candidate paramCount=3. The class's own 1-arg method is never considered. FPC: innermost scope (the class) wins — this compiles.

Minimal repro compiles fine when NO plain proc named Move exists — the bug needs the name collision. Currently breaks the adventure demo (dashboard FAIL, pre-existing).

Likely fix

In the statement/factor ident call classification, check FindUMeth(CurSelfClass, name) BEFORE falling through to the plain-proc MatchProcCall — or make MatchProcCall failure fall back to the method path instead of erroring. Same family as the unqualified Read/Write→member fix (done 2026-06-25) and the Move/FillChar soft-alias guard (v149), both of which already consult FindUMeth — the generic call path is what's missing it.

Acceptance

adventure.pas compiles + demo green; minimal repro (method Move + uses unit with proc Move) FPC-parity; no change to plain overload resolution otherwise; self-host byte-identical.

Resolution (2026-07-02, v150)

Fixed in parser.inc: after the idx/procIdx lookup in BOTH the statement and expression (factor) ident paths, procIdx is cleared when the name is unqualified, no local/param shadows it, and FindUMeth(CurSelfClass, name) hits — the existing implicit-Self dispatch then takes the call. Plain-proc resolution outside methods (and unit-qualified calls) unchanged.

Test: test/test_method_shadows_unit_proc.pas (FPC-oracle-verified: method wins over sysutils.Move, same-file plain proc, and via the virtual path; plain proc still reachable outside methods). Adventure demo compiles + runs. Self-host byte-identical, full make test green, pinned v150.