compile: bare hasOwnProperty.call(...) (Object.prototype member via globalThis) throws 'value is not a function' — pi wall #6 #6652

Wall #6 of the pi coding-agent bring-up (tracker #6564; prior: #6593, #6604, #6644, #6649, #6651 all fixed). With the five fixes applied, pi-native --help/--version die during module init with:

TypeError: value is not a function
    at pi-bundle.mjs:203852

(line resolved by a --debug-symbols build, dist/pi-native-dbg; the stripped build says at <anonymous>.)

Site: @babel/types/lib/definitions/placeholders.js (webpack-wrapped CJS factory in the bundle), pi-bundle.mjs:203852:

Object.keys(i2).forEach((e4) => {
  i2[e4].forEach((t4) => {
    hasOwnProperty.call(o, t4) || (o[t4] = []), o[t4].push(e4);   // ← line 203852
  });
});

Root cause / subsystem: the BARE identifier hasOwnProperty — Node resolves it through the scope chain to the global object, which inherits Object.prototype.hasOwnProperty, so hasOwnProperty.call(o, t4) works. Perry's unknown-identifier path (Warning: unknown identifier 'hasOwnProperty' — assuming global; member access will dispatch by name at runtime, bare reads lower to 0) does not serve Object.prototype-INHERITED members of the global object, so the .call member dispatch comes back non-callable and the call site throws. Not a module-resolution issue — the #6651 family is closed (the bundle's node:v8 / stream/web / fs/promises requires all resolve now).

3-line repro (node: bare: true false; perry: compile warning above + TypeError: value is not a function, rc=1):

const o: any = { x: 1 };
// bare global hasOwnProperty (inherited from Object.prototype via globalThis)
console.log("bare:", hasOwnProperty.call(o, "x"), hasOwnProperty.call(o, "y"));

Scope: grep -c "unknown identifier 'hasOwnProperty'" compile6651.log → 14 sites in the pi bundle (plus 2 bare-toString sites — same subsystem, likely walls #7-ish if fixed per-identifier; one fix for "assume-global member access must consult the global object's Object.prototype chain" should cover the whole class).

Repro binaries: secret-tests/pi-target/dist/pi-native (stripped, #6603+#6633+#6647+#6650+#6651 fixes) and pi-native-dbg (debug symbols, prints the bundle line); pi-native.pre6651 reproduces wall #5 for contrast. HOME=$(mktemp -d) ./pi-native --help.