Panic when unhandled error in worker in worker

[kuuote]

Repro step

1. Place following files

a.js:

new Worker(new URL("./b.js", import.meta.url).href, {type: "module"});

b.js:

new Worker(new URL("./c.js", import.meta.url).href, {type: "module"});

c.js:

throw Error();

2. Run deno run --allow-read a.js

Problem

Panic with this error.

error: Uncaught (in worker "") Error
throw Error();
      ^
    at file:///home/arch/c.js:1:7
thread 'worker-0' panicked at 'coding error: either js is polling or the worker is terminated', runtime/web_worker.rs:531:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
error: Uncaught (in promise) Error: Unhandled error event reached main worker.
    at Worker.#pollControl (deno:runtime/js/11_workers.js:261:23)

Expected

I want to occurs JS Error similar to case of only one worker.

error: Uncaught (in worker "") Error
throw Error();
      ^
    at file:///home/arch/b.js:1:7
error: Uncaught (in promise) Error: Unhandled error event reached main worker.
    at Worker.#pollControl (deno:runtime/js/11_workers.js:261:23)

Environment

deno 1.13.2 (release, x86_64-unknown-linux-gnu)
v8 9.3.345.11
typescript 4.3.5

[bartlomieju]

CC @andreubotella

[andreubotella]

This is the same panic as in #11342, and probably related to the nested worker case in #11342 (comment)

[bartlomieju]

Thanks, closing in favor of #11342