Closed
Description
#51255 makes the following test fail:
import { test } from 'node:test'
import assert from 'node:assert'
test('repro', async (t) => {
const buf = new Uint8Array(1)
const readable = new ReadableStream({
start (controller) {
controller.enqueue(buf)
controller.close()
}
})
const [out1, out2] = readable.tee()
const cloned = structuredClone(out2, { transfer: [out2] })
for await (const chunk of cloned) {
assert.deepStrictEqual(chunk, buf)
}
for await (const chunk of out2) {
assert.deepStrictEqual(chunk, buf)
}
for await (const chunk of out1) {
assert.deepStrictEqual(chunk, buf)
}
})with:
✖ repro (5.626125ms)
'Promise resolution is still pending but the event loop has already resolved'
ℹ tests 1
ℹ suites 0
ℹ pass 0
ℹ fail 0
ℹ cancelled 1
ℹ skipped 0
ℹ todo 0
ℹ duration_ms 8.293458
✖ failing tests:
test at file:/Users/matteo/Repositories/node/repro.mjs:6:1
✖ repro (5.626125ms)
'Promise resolution is still pending but the event loop has already resolved'
It seems that #51255 unveiled a problem of a lingering promise not being resolved properly after the two MessagePorts have been closed.
This emerged in undici, see nodejs/undici#2617 for more details.
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