[Bug 2055402] Re: Though lintian call: error: troff: Segmentation fault

[Loïc Minier]

** Description changed:

- Hello,
+ groff crash when redirecting output to a file
  
- I was trying to run lintian on some deb packages an run onto some errors
- messages from groff.
- 
- Steps to reproduce:
- 
- 1. Setup a LXD container with mantic or Noble:
- 
- lxc launch ubuntu-daily:noble #or lxc launch ubuntu:mantic
- 
- 2. After getting connected to the container: Install lintian on it
- 
- apt install lintian
- 
- 3. Run lintian on some package inside the container:
- 
- apt download tree && lintian tree_*.deb
- 
- 4. Enjoy the groff-message logs:
- 
- W: tree: groff-message command exited with status 2: /usr/libexec/man-db/zsoelim | /usr/libexec/man-db/manconv -f UTF-8:ISO-8859-1 -t UTF-8//IGNORE | preconv -e UTF-8 | groff -mandoc -Z -rLL=117n -rLT=117n -wmac -Tutf8 [usr/share/man/man1/tree.1.gz:2]
- W: tree: groff-message error: troff: Segmentation fault (core dumped) [usr/share/man/man1/tree.1.gz:1]
- 
- * Container infos:
- 
- lsb_release -rd
- 
- No LSB modules are available.
- Description:    Ubuntu Noble Numbat (development branch)
- Release:        24.04
- 
- * Packages infos:
- 
- apt-cache policy groff
- groff:
-   Installed: (none)
-   Candidate: 1.23.0-3
-   Version table:
-      1.23.0-3 500
-         500 http://archive.ubuntu.com/ubuntu noble/universe amd64 Packages
- 
- apt-cache policy lintian
- lintian:
-   Installed: 2.117.0ubuntu1
-   Candidate: 2.117.0ubuntu1
-   Version table:
-  *** 2.117.0ubuntu1 500
-         500 http://archive.ubuntu.com/ubuntu noble/main amd64 Packages
-         100 /var/lib/dpkg/status
- 
- * Expected output (on Jammy): No segfault and no problem on the tested
- package with lintian (tree_2.1.1-2_amd64.deb)
+ % man --warnings -E UTF-8 -l -Tutf8 -Z /usr/share/man/man1/cat.1.gz >output
+ troff:<standard input>:3: fatal error: unable to flush output file: Permission denied
+ groff: error: troff: Segmentation fault (core dumped)
+ man: command exited with status 2: /usr/libexec/man-db/zsoelim | /usr/libexec/man-db/manconv -f UTF-8:ISO-8859-1 -t UTF-8//IGNORE | preconv -e UTF-8 | tbl | groff -mandoc -Z -rLL=78n -rLT=78n -wmac -Tutf8

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https://bugs.launchpad.net/bugs/2055402

Title:
  Though lintian call: error: troff: Segmentation fault

Status in groff package in Ubuntu:
  Confirmed

Bug description:
  groff crash when redirecting output to a file

  % man --warnings -E UTF-8 -l -Tutf8 -Z /usr/share/man/man1/cat.1.gz >output
  troff:<standard input>:3: fatal error: unable to flush output file: Permission denied
  groff: error: troff: Segmentation fault (core dumped)
  man: command exited with status 2: /usr/libexec/man-db/zsoelim | /usr/libexec/man-db/manconv -f UTF-8:ISO-8859-1 -t UTF-8//IGNORE | preconv -e UTF-8 | tbl | groff -mandoc -Z -rLL=78n -rLT=78n -wmac -Tutf8

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