Re: troff noise when grepping man page?

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Am Do., 30. Nov. 2023 um 01:14 Uhr schrieb Chris Murphy <lists@xxxxxxxxxxxxxxxxx>:
$ man 5 btrfs | grep enospc
       enospc_debug, noenospc_debug
troff:<standard input>:870: warning: cannot select font 'C'
troff:<standard input>:888: warning: cannot select font 'C'
troff:<standard input>:905: warning: cannot select font 'C'
troff:<standard input>:924: warning: cannot select font 'C'
troff:<standard input>:962: warning: cannot select font 'C'
troff:<standard input>:977: warning: cannot select font 'C'
troff:<standard input>:999: warning: cannot select font 'C'
troff:<standard input>:1013: warning: cannot select font 'C'
troff:<standard input>:1168: warning: cannot select font 'C'
troff:<standard input>:1184: warning: cannot select font 'C'
troff:<standard input>:1259: warning: cannot select font 'C'
troff:<standard input>:1275: warning: cannot select font 'C'
troff:<standard input>:1293: warning: cannot select font 'C'
troff:<standard input>:1354: warning: cannot select font 'C'
...snip...

This seems new with Fedora 39. The root file system is newly installed not an upgrade, but the ~/ is positively ancient (possibly 5 years). Any ideas what's going on, how to get more information, and what component to file a bug against?


That man page contains `.ft C` sequences to select a font, but that should probably be `.ft CR` (for constant width Roman) or any other of the C variants, but not just `C`. Either roff sequences changed ( I don't think so) or doc generation. More likely, we get warnings on stderr now here we used to ignore them in /dev/null ...

A quick scan shows indeed many man pages with problems or warnings.

Michael 
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