warning: regexp escape sequence `\"' is not a known regexp operator

[lacygoill]

• $ gawk -V:

   GNU Awk 4.2.62, API: 2.0 (GNU MPFR 3.1.4, GNU MP 6.1.0)
  

• $ trans -V:

   gawk: /dev/fd/63:176: warning: regexp escape sequence `\"' is not a known regexp operator
   Translate Shell       0.9.6.4-git:84eaf66
  
   platform              Linux
   gawk (GNU Awk)        4.2.62
   fribidi (GNU FriBidi) [NOT INSTALLED]
   audio player          mpv
   terminal pager        less
   terminal type         tmux-256color
   user locale           en_US (English)
   home language         en
   source language       auto
   target language       en
   translation engine    google
   proxy                 [NONE]
   user-agent            Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/602.1 (KHTML, like Gecko) Version/8.0 Safari/602.1 Epiphany/3.18.2
   theme                 default
   init file             [NONE]
  
   Report bugs to:       https://github.com/soimort/translate-shell/issues
  

When I run any $ trans command, such as:

$ trans -V

Or:

$ trans 'Saluton, Mondo!'

The output begins with the following warning from gawk:

gawk: /dev/fd/63:176: warning: regexp escape sequence `\"' is not a known regexp operator

It seems to be due to this commit in the gawk codebase.

[soimort]

Thanks for the report.

0.9.6.4 was a quite outdated version of translate-shell; a lot of code might have changed since then. Can you please confirm if the warning persists with the newest version 0.9.6.9?

[lacygoill]

Yes, I think the issue is still present in 0.9.6.9. I've just re-installed the latest version I could find from github, and the output of trans -V still begins with a warning:

$ trans -V
gawk: /dev/fd/63:177: warning: regexp escape sequence `\"' is not a known regexp operator
Translate Shell       0.9.6.9-git:b13772d

platform              Linux
gawk (GNU Awk)        4.2.62
fribidi (GNU FriBidi) 0.19.7
audio player          mpv --no-config
terminal pager        less
terminal type         tmux-256color
user locale           en_US.UTF-8 (English)
home language         en
source language       auto
target language       en
translation engine    google
proxy                 [NONE]
user-agent            Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/602.1 (KHTML, like Gecko) Version/8.0 Safari/602.1 Epiphany/3.18.2
theme                 default
init file             [NONE]

Report bugs to:       https://github.com/soimort/translate-shell/issues

[soimort]

Thanks. Now I can reproduce it under the latest git build of gawk, too.

[zouhair]

Now that gawk version 5.0.0 is out the same problem happens again, as gawk change the regex routines now using GNULIB's ones.

https://lists.gnu.org/archive/html/info-gnu/2019-04/msg00002.html

[forthrin]

Happens on macOS/Homebrew too with version 0.9.6.9 and gawk 5.0.0.

[rsmnarts]

same problem

[zouhair]

Last version fixed it.

https://github.com/soimort/translate-shell/releases/tag/v0.9.6.10