deno run doesn't terminate when node:child_process.fork() is used

[uasi]

// parent.mjs
import { fork } from "node:child_process";
fork("child.js");

// child.js
console.log("hello");

% node parent.mjs
hello

% deno run -A parent.mjs
hello
# ...deno hangs

Versions

% node --version
v20.12.2

% deno --version
deno 1.45.2 (release, aarch64-apple-darwin)
v8 12.7.224.12
typescript 5.5.2

[uasi]

Apparently, setting "ipc" to the stdio option of node:child_process.spawn() causes Deno to hang.

https://github.com/denoland/deno/blob/v1.45.4/ext/node/polyfills/child_process.ts#L145-L156

// spawn.mjs
import { spawn } from "node:child_process";
spawn("/bin/echo", ["hello"], { stdio: ["inherit", "inherit", "inherit"] });

// spawn_ipc.mjs
import { spawn } from "node:child_process";
spawn("/bin/echo", ["hello"], { stdio: ["inherit", "inherit", "inherit", "ipc"] });

% deno run -A spawn.mjs
hello

% deno run -A spawn_ipc.mjs
hello
# deno hangs

[nathanwhit]

I'm currently working on this - should have a PR to fix this (and some other child_process ipc related issues) soon