groff crashed with signal 31 in kill()

[George Shuklin]

man for user under sudo is broken.

sudo -s
man ls

man: can't change directory to '/home/amarao': Permission denied
man: command exited with status 159: /usr/lib/man-db/zsoelim | /usr/lib/man-db/manconv -f UTF-8:ISO-8859-1 -t UTF-8//IGNORE | preconv -e UTF-8 | tbl | nroff -mandoc -rLL=274n -rLT=274n -Tutf8

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: groff-base 1.22.3-10
ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
Uname: Linux 4.15.0-10-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
Date: Mon Feb 26 11:53:54 2018
Dependencies:
 gcc-8-base 8-20180208-0ubuntu1
 libc6 2.26-0ubuntu2.1
 libgcc1 1:8-20180208-0ubuntu1
 libstdc++6 8-20180208-0ubuntu1
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-20160624-2
ExecutablePath: /usr/bin/groff
InstallationDate: Installed on 2017-06-22 (249 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
ProcAttrCurrent: /usr/bin/man (enforce)
ProcCmdline: groff -mtty-char -Tutf8 -mandoc -rLL=274n -rLT=274n
Signal: 31
SourcePackage: groff
StacktraceTop:
 kill () from /lib/x86_64-linux-gnu/libc.so.6
 ?? ()
 ?? ()
 ?? ()
 __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
Title: groff crashed with signal 31 in kill()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 kill () at ../sysdeps/unix/syscall-template.S:84
 run_pipeline (ncommands=<optimized out>, commands=0x7ffc45de2bc0, no_pipe=<optimized out>) at ./debian/build/../../src/roff/groff/pipeline.c:529
 run_commands (no_pipe=0) at ./debian/build/../../src/roff/groff/groff.cpp:579
 main (argc=<optimized out>, argv=<optimized out>) at ./debian/build/../../src/roff/groff/groff.cpp:494

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Joel (jocaez)]

When it happened to me I was trying to load a manpage on a root shell.
sudo -s

man lvcreate
man: can't change directory to '/home/user': Permission denied
man: command exited with status 159: /usr/lib/man-db/zsoelim | /usr/lib/man-db/manconv -f UTF-8:ISO-8859-1 -t UTF-8//IGNORE | preconv -e UTF-8 | tbl | nroff -mandoc -rLL=136n -rLT=136n -Tutf8