Subject: Re: bug#22344: 25.0.50 (and 24.5.1, 24.4); Sending 4097 bytes to a subprocess hangs Emacs on Windows 8 and 10

From: Clément Pit--Claudel <[email-masked]>
Date: Mon, 11 Jan 2016 13:02:47 -0500

On 01/11/2016 12:51 PM, Eli Zaretskii wrote:
>> Cc: [email-masked]
>> From: Clément Pit--Claudel <[email-masked]>
>> Date: Mon, 11 Jan 2016 12:18:27 -0500
>>
>> Here is a simplified test case, which only assumes node.js:
>>
>> * In a file C:\blackhole.js
>>
>> function blackhole() {
>>     var stream = process.openStdin();
>>     stream.setEncoding("utf-8");
>>     stream.on('data', function (chunk) { process.stdout.write(chunk); });
>> }
>> blackhole();
> 
> Thanks.  Are all the affected programs written in JavaScript?  Do they
> all set stdin encoding to UTF-8?  If so, does the problem go away if
> you remove the line that sets the encoding?

No, the following javascript implementation of cat also reproduces the issue:

function blackhole() {
    process.stdin.resume();
    process.stdin.setEncoding("ascii");
    process.stdin.on('data', function (chunk) { process.stdout.write(chunk); });
}
blackhole();