ReadableStreamBYOBReader read() does not cancel

[Borewit]

What version of Bun is running?

1.2.2+c1708ea6a

What platform is your computer?

Linux 6.11.11-300.fc41.x86_64 x86_64 unknown

What steps can reproduce the bug?

While in a pending read() operation on a ReadableStreamBYOBReader, aborting the ReadableStreamBYOBReader does not interrupt the read operation.

I have created a repository to reproduce the issue: https://github.com/Borewit/bun-abort-ReadableStreamBYOBReader-read

Bun test can the executed by:

bun run bun:test

Same tests can be executed by Node.js:

npm run node:test

What is the expected behavior?

I expect when a pending read() operation on a ReadableStreamBYOBReader to resolve with result {done: true, value: undefined} when cancel() is called.

Output of bun run bun:test, output of the cancel ReadableStreamBYOBReader test:

Reading from ReadableStreamBYOBReader...
Cancelling reader...
Stream was canceled: Canceling the reader while reading.
error: Test "cancel ReadableStreamBYOBReader" timed out after 5000ms
✗ Cancel async read operation on ReadableStream > cancel ReadableStreamBYOBReader [5000.13ms]

 1 pass
 1 fail
Ran 2 tests across 1 files. [5.02s]
error: script "bun:test" exited with code 1

What do you see instead?

ReadableStreamBYOBReader read() hangs waiting for the promise to be resolved.

Output running both tests with Node.js:

▶ Cancel async read operation on ReadableStream
  ✔ cancel ReadableStreamDefaultReader (7.421874ms)
  ✔ cancel ReadableStreamBYOBReader (0.887882ms)
✔ Cancel async read operation on ReadableStream (9.347097ms)
ℹ tests 2
ℹ suites 1
ℹ pass 2
ℹ fail 0
ℹ cancelled 0
ℹ skipped 0
ℹ todo 0
ℹ duration_ms 112.704046

Additional information

No response