GNU Parallel Bug Reports --header and --colsep parsing is aberrant when used without arguments

[Coby Viner]

--header and --colsep parsing is aberrant when used without arguments.

Example error text:

N/A (but please see below warnings for failing case 2)

 

Parallel version (latest):

address@hidden:~] parallel --version

GNU parallel 20170622
Copyright (C) 2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017
Ole Tange and Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
This is free software: you are free to change and redistribute it.
GNU parallel comes with no warranty.

Web site: http://www.gnu.org/software/parallel

When using programs that use GNU Parallel to process data for publication
please cite as described in 'parallel --citation'.

address@hidden:~]

 

Error example:

Failing case 1:

address@hidden:~] parallel --dry-run -j 1 --header --colsep '\t' "echo f1={f-1} f2={f2}" :::: <(perl -e 'printf "f-1\tf2\nA\tB\nC\tD\n"')
\t echo f1=A f2=B
\t echo f1=C f2=D

address@hidden:~]

 

Failing case 2:

address@hidden:~] parallel --dry-run -j 1 --header '.*\n' --colsep "echo f1={f-1} f2={f2}" :::: <(perl -e 'printf "f-1\tf2\nA\tB\nC\tD\n"')
Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/echo f1={ <-- HERE f-1} f2={f2}/ at /mnt/work1/users/home2/cviner/bin/parallel line 164, <GEN0> line 1.
Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/echo f1={f-1} f2={ <-- HERE f2}/ at /mnt/work1/users/home2/cviner/bin/parallel line 164, <GEN0> line 1.
Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/echo f1={ <-- HERE f-1} f2={f2}/ at /mnt/work1/users/home2/cviner/bin/parallel line 10139, <GEN0> line 2.
Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/echo f1={f-1} f2={ <-- HERE f2}/ at /mnt/work1/users/home2/cviner/bin/parallel line 10139, <GEN0> line 2.
A    B
C    D

address@hidden:~]

 

Passing case:

address@hidden:~] parallel --dry-run -j 1 --header : --colsep '\t' "echo f1={f-1} f2={f2}" :::: <(perl -e 'printf "f-1\tf2\nA\tB\nC\tD\n"')
echo f1=A f2=B
echo f1=C f2=D

 

address@hidden:~] 

 

Platform:

address@hidden:~] uname -a

Linux mordor 2.6.32-642.6.2.el6.x86_64 #1 SMP Wed Oct 26 06:52:09 UTC 2016 x86_64 GNU/Linux

address@hidden:~] 

 

Description:

It appears that --header and --colsep when used with their default arguments can produce inconsistent results, if an argument is provided to only one of the two parameters. The result is counter-intuitive.

Thank you,

Coby Viner