compilePackages: rxjs program exits 13 with 'Detected unsettled top-level await'

[proggeramlug]

Perry: origin/main @ a674b6e (v0.5.1167) · macOS arm64
Setup: package compiled natively via perry.compilePackages (perry.allow.compilePackages: ["*"])
Build/run: perry repro.ts -o out && ./out

(Found via an internal real-package stress run — importing the real package and exercising it.)

Bug

An await firstValueFrom(of(...).pipe(...)) against rxjs never settles — the process exits 13 with Warning: Detected unsettled top-level await. The observable pipeline appears not to drive its subscriber to completion.

Repro

import { of, map, filter, reduce, firstValueFrom } from 'rxjs';

const sum = await firstValueFrom(of(1, 2, 3, 4, 5).pipe(filter((x) => x % 2 === 1), map((x) => x * 10), reduce((a, b) => a + b, 0)));
console.log(sum);

Expected (Node)

90

Actual (Perry)

exit 13 — Detected unsettled top-level await