[Bug 1942974] Re: troff crashed with SIGSEGV

[Colin Watson]

The stack trace looks very much like it would be the effect of
https://savannah.gnu.org/bugs/index.php?59202, fixed in
https://git.savannah.gnu.org/cgit/groff.git/commit/?id=c788cf8c6bbe939fa11f7ec032e525a7e33f41b6.

** Bug watch added: GNU Savannah Bug Tracker #59202
   http://savannah.gnu.org/bugs/?59202

** Also affects: groff via
   http://savannah.gnu.org/bugs/?59202
   Importance: Unknown
       Status: Unknown

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Title:
  troff crashed with SIGSEGV

Status in Groff:
  Unknown
Status in groff package in Ubuntu:
  New

Bug description:
  Crash occurred while running lintian, was reproducible with every run.

  ProblemType: Crash
  DistroRelease: Ubuntu 21.10
  Package: groff-base 1.22.4-6
  ProcVersionSignature: Ubuntu 5.13.0-14.14-lowlatency 5.13.1
  Uname: Linux 5.13.0-14-lowlatency x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu68
  Architecture: amd64
  CasperMD5CheckResult: unknown
  Date: Tue Sep  7 15:02:26 2021
  Disassembly: => 0x0:	Cannot access memory at address 0x0
  ExecutablePath: /usr/bin/troff
  InstallationDate: Installed on 2021-03-20 (171 days ago)
  InstallationMedia: Ubuntu-Studio 21.04 "Hirsute Hippo" - Alpha amd64 (20210320)
  ProcCmdline: troff -mandoc -rLL=117n -rLT=117n -wmac -Tutf8
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
  SegvAnalysis:
   Segfault happened at: 0x0:	Cannot access memory at address 0x0
   PC (0x00000000) not located in a known VMA region (needed executable region)!
  SegvReason: executing NULL VMA
  Signal: 11
  SourcePackage: groff
  StacktraceTop:
   ?? ()
   ?? ()
   ?? ()
   ?? ()
   ?? ()
  Title: troff crashed with SIGSEGV
  UpgradeStatus: Upgraded to impish on 2021-06-13 (86 days ago)
  UserGroups: adm audio cdrom dip libvirt lpadmin plugdev sambashare sudo
  separator:

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