* What led up to the situation?
Checking for defects with
[test-]groff -mandoc -t -K utf8 -rF0 -rHY=0 -ww -b -z < "man page"
[test-groff is a script in the repository for "groff"] (local copy and
"troff" slightly changed by me).
* What was the outcome of this action?
troff: backtrace: '/home/bg/git/groff/build/s-tmac/an.tmac':709: string 'an-result'
troff: backtrace: '/home/bg/git/groff/build/s-tmac/an.tmac':715: macro 'RI'
troff: backtrace: file '<stdin>':217
troff:<stdin>:217: warning: ignoring escape character before '+'
an.tmac:<stdin>:580: warning: cannot nest .TP or .TQ inside .TP; supply a tag
* What outcome did you expect instead?
No output (no warnings).
-.-
General remarks and further material, if a diff-file exist, are in the
attachments.