bug#18506: stty dsusp undef fails.

$ stty dsusp undef stty: invalid argument ‘dsusp’ Try 'stty --help' for more information. $ stty --help | grep dsusp * dsusp CHARCHAR will send a terminal stop signal once input flushed $ stty --version stty (GNU coreutils) 8.21 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+:

bug#37093: wc runs 100% cpu when in pipeline or tee >(wc)

In the demo below, dd uses 0.665s to write 1GiB of zeros. sha256sum uses 4.285s to calculate the sha256 of 1GiB of zeros. wc uses 32.160s to count 1GiB of zeros. Linux localhost 5.2.8-200.fc30.x86_64 #1 SMP Sat Aug 10 13:21:39 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux coreutils-8.31-2.fc30.x86_64 dd