<!-- Please read our Bug reporting guidelines before opening a bug: https://wiki.archlinux.org/title/Bug_reporting_guidelines If you want to help catching more bugs upfront, consider joining the Arch Testing Team: https://wiki.archlinux.org/title/Arch_Testing_Team --> # Description: When `awk` (linked to `gawk-5.3.1`) prints something to the terminal, it seems to break every subsequent call to `cat -v`. The error message from `cat` is: ```sh cat: -: input file is output file ``` I set up a Virtual Machine with Ubuntu 24.10 and compiled `gawk-5.3.1` from the source, and the issue is not reproducible there. However, it can be reproduced on the Arch Installer ISO with the same version (see below). Signs: - [ ] no issue - [x] issue present Special conditions to reproduce the error: 1. [ ] No stdout (no issue): ```sh gawk '' &>/dev/null ``` 2. [x] Something is printed: ```sh gawk '' echo "1 2 3" | gawk '{print $1}' gawk --version gawk --help ``` Affected commits of `gawk`: 1. [ ] aclocal 1.16.5 - `45d52267` Better fix for inplace tests on BSD systems. 2. [x] aclocal 1.16 - `f43f8f01` Update doc/gawk.info. 3. [x] Right after `./configure`. It means that all commits below `f43f8f01`, including version 5.3.1, produce this error. The same applies to `awk` (`gawk-5.3.1`) downloaded from the official repository and to the `gawk-5.3.1` compiled from the source code. Note: `mawk` works fine. # Additional info: * package version(s): gawk-5.3.1 * config and/or log files: none * link to upstream bug report, if any: https://lists.gnu.org/archive/html/bug-gawk/2025-03/threads.html # Steps to reproduce: 1. gawk '' 2. cat -v