* Thomas Dickey <dic...@his.com> [2018-12-30 23:14]: > On Sun, Dec 30, 2018 at 10:15:53PM +0100, Sven Joachim wrote: >> On 2018-12-30 18:26 +0100, Alexander Meyer wrote: >>> So the segfault only happens with that fonts.conf. >> >> Thanks, that explains why others did not see it - and possibly also why >> I could still reproduce #916349 in xterm 340, as I have my own >> fonts.conf, albeit a much shorter and simpler one than yours. >> >> Alas, with your file (saved as /tmp/fonts.conf) xterm does not even start >> here, although I have fonts-noto-mono and fonts-noto-color-emoji >> installed: > > If xterm sees the latter, it will not start. That's a problem that can > only be solved by modifying Xft. Not xterm. > > But the short term goal is to get xterm working as well as feasible with > Xft before moving on to see what can be done to make Xft handle the > color bitmap fonts. > > I'm looking for details on how to reproduce the segmentation violation > which was reported. > >> ,---- >> | $ FONTCONFIG_FILE=/tmp/foo/fonts.conf xterm -fa 'Noto Mono' > > Back up a step: with that fonts.conf, I get no result for > fc-match 'Noto Mono' > > while without it, I do get a match. A quick look at strace tells me > that setting FONTCONFIG_FILE eliminates a lot of the normal configuration > information, and probably isn't what you want to do in reproducing the > problem.
For the record: I disabled/enabled my fonts.conf by moving it out of ~/.config/fontconfig/ and then back inside. I did not set FONTCONFIG_FILE. Also, as described in my original report, the segfault is not limited to "Noto Mono" but seems to happen with any other font, too. (I've randomly tried a few from my fc-list.) >> | xterm: cannot match normal font "Noto Mono" >> | xterm: Selected font has no non-zero height for ISO-8859-1 encoding > > ...and because there's no match, for _this_ case I get the same failure. > > However, that's not a bug (in xterm), but a problem with configuration. > >> So I am a bit at a loss here. And I am definitely not a an expert on >> fontconfig (or fonts in general) either. > > I'd like to see the XFT_DEBUG information from the known broken scenario. > If it tells me that Xft is still loading the color-noto font, there's > probably nothing that I can do to address that in xterm. Please find attached the gzipped output of $ XFT_DEBUG=1023 xterm -fa 'Noto Mono' with xterm 341. All output happens directly after startup, there's no output after issuing the command that displays the character that causes the segfault. Best Alex
xterm-341-XFT_DEBUG_1023.log.gz
Description: application/gzip
