Async iterator on process.stdin not working correctly?

[tlrobinson]

Version: v10.7.0
Platform: Darwin x.local 17.7.0 Darwin Kernel Version 17.7.0: Thu Jun 21 22:53:14 PDT 2018; root:xnu-4570.71.2~1/RELEASE_X86_64 x86_64
Subsystem: process

I'm aware async iteration on streams is experimental, and perhaps I'm doing something wrong, but the following just returns without printing anything after you type the first new line (or the first character if you process.stdin.setRawMode(true)):

(async function() {
  for await (const chunk of process.stdin) {
    process.stdout.write(chunk);
  }
})()

However it works correctly if you pipe something to the process. Also, it does work correctly if you use fs.createReadStream("/dev/stdin") instead of process.stdin:

const fs = require("fs");
(async function() {
  for await (const chunk of fs.createReadStream("/dev/stdin")) {
    process.stdout.write(chunk);
  }
})()

Besides this, async iteration of streams is great!

[Jamesernator]

The cause of this is most likely the same as in #20503 , although thanks for an interesting workaround by using /dev/stdin as I hit this issue recently.

[addaleax]

Looks like this has been fixed in fe47b8b as well. Thanks for the bug report!