chore: re-pin stable to expose the new System intrinsics to Track B

• Type: chore (Track A — pinning) / cross-track signal
• Status: done
• Found: 2026-06-23, differential probe vs FPC (Track B)
• Severity: medium (Track B cannot use shipped intrinsics until re-pinned)

Situation

Several System intrinsics have landed in the compiler but are NOT in the pinned stable (stable_linux_amd64/default/pinned, v38) that Track B builds against, so Track B code using them fails at compile with undefined variable:

• Succ / Pred / Odd (5f3dfe5)
• Abs / Sqr (3604594)
• UpCase / Pos (f078bc9)
• Concat (91f5750)
• Delete / Insert (5d38bef)

Verified: with the pinned v38, writeln(succ('a')), abs(-9), upcase('x'), pos('cd', s) all report undefined variable; the engine/demo code therefore still hand-rolls these (e.g. solitaire/2048 avoid Pos, use manual run/merge).

Ask (Track A)

make stabilize + make pin once the intrinsics are settled, and commit stable_linux_amd64/**, so Track B can drop the hand-rolled equivalents and use Pos/UpCase/Abs/Succ/Delete/Insert directly. No code change required here — purely a re-pin.

Note

Not urgent-blocking (Track B has working idioms), but it removes a pile of interim hand-rolls across the library/demo lane.

Update 2026-06-23 — large fix batch now waiting on a pin

Since this was filed, Track A landed many fixes in compiler/ that the pinned v38 (aa055c5) does NOT yet include — tools/fpc_diff_probe.sh still shows all 16 known divergences against the pin. A re-pin would expose, in one go:

• a034eaa Length accepts any string/array r-value (+ 4281ed0 literal fold) — unblocks GUI code like Length(memo.Text) (the eliah smoke worked around it)
• 57d8f49 nested { } / (* *) comments
• da4c8f9 variant-record union layout
• d828533 inline ParamStr(i) + out-of-range returns ''
• 3a2e952 binary literals / explicit enum values / subrange types Plus the earlier Succ/Pred/Odd/Abs/Sqr/UpCase/Pos/Concat/Delete/Insert intrinsics. Net: a pin bump retires ~10 Track-B interim idioms at once.

Resolution (2026-06-23)

Re-pinned: make stabilize (full test + 4-iteration fixedpoint, green) + make pin → stable v39 (sha 59d5aa64…), builtin RTL re-frozen. Exposes to Track B, in one bump: the Succ/Pred/Odd/Abs/Sqr/UpCase/Pos/Concat/Delete/Insert intrinsics plus this session's fixes — Length r-value getter, nested comments, variant-record union layout, inline ParamStr, binary literals / explicit enum / subrange types, default parameters, @obj.Method→Pointer, and array-constructor open-array args. Closes chore-repin-new-intrinsics.