arecord command stop when output file set /dev/null

[GitHub issues - opened]

alsa-project/alsa-utils issue #48 was opened from garyfcg:

How to reproduce it?
1. Input the below command, then record go on 
arecord -r 96000 -c 4 -f S32_LE  1> /dev/null 

2. Wait for some minutes, it depended on system memory size.
For example,system memory had 2G, 
(2*1024*1024*1024)/(96k*4*32/8)=1400s

The results:
1. this command quit auto.

Expect:
1. This command should not be interrupted.

Issue URL     : https://github.com/alsa-project/alsa-utils/issues/48
Repository URL: https://github.com/alsa-project/alsa-utils