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Re: Pipe after Command Substitution does not resolve the substitution:




Firstly, i should clarify the problem definition asap by including
this fourth example which shows a pipe working fine when it is not
preceded by command substitution:

$ grep 2 test.txt | grep 3
grep 2 test.txt | grep 3
+ grep 2 test.txt
+ grep 3
23

Thanks Brian for all the suggestions and for showing it running on
Win10.0.14393. Below is from the culprit:

====
$ cmd /c ver

Microsoft Windows [Version 10.0.15063]

$ uname -svrmo
CYGWIN_NT-10.0 2.8.0(0.309/5/3) 2017-04-01 20:47 x86_64 Cygwin

$ bash --version
GNU bash, version 4.4.12(3)-release (x86_64-unknown-cygwin)
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

====

I don't want to waste any time on this list if the cause is my user
error but this is a different build of Win10 and i have rerun setup
(including autorebase) and tested with BLODA off, including all AV,
and <CYGWIN=detect_bloda> which reported nothing.

You say that "Command substitution adds arguments to the command line
and does not interfere with pipes" which i also believe is the
intended behaviour and why i have raised this as a potential bug
according to the output from the four examples with <set -xv>. Do they
not show that it is the combination of the pipe and the command
substitution which is not working?

Finally, did you mean that i should try Cygwin 32? or to check that i
was not using Cygwin 32?

Thanks again.

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