Calling `next` on `console`'s asyncIterable causes its stream to become locked

I need to read the first line from stdin, perform some logic, and then iterate over the remaining lines of stdin. The suggested way from the docs (https://bun.sh/docs/api/console) to iterate over stdin lines is using its asyncIterator. But there's no suggested method to get a single line.

I attempted to call the asyncIterator method directly:

let firstLine = (await console[Symbol.asyncIterator]().next()).value;
// perform logic on firstLine
for await (const line of console) {
  // perform logic on remaining lines
}

Defining firstLine this way works. However it will fail on const line of console with the error ReadableStream is locked It seems that manually retrieving an item from console's asyncIterator causes its stream to become locked, and I'm unsure how to unlock it.

I tried using the prompt function with an empty string as the message. But it seems prompt will still print a single space character to stdout if called with an empty string as the message. So it's not ideal.

The best working solution I have right now is to write a for loop that I break out of after one iteration.

for await (const line of console) {
  // perform logic on first line
  break;
}
for await (const line of console) {
  // perform logic on remaining lines
}

I'd appreciate any suggestions on how to unlock the ReadableStream, or how to more elegantly handle this use case.

Originally reported on Discord: Calling nextonconsole's asyncIterable causes its stream to become locked