After I install the fonts noto-sans-cjk-fonts, when I start xfig I got these
warnings in the terminal:

Warning: Missing charsets in String to FontSet conversion
Warning: Cannot convert string "-URW-Nimbus Roman No9
L-medium-r-normal--34-*-*-*-*-*-*-*,-kochi-mincho-medium-r-normal--34-*-*-*-*-*-jisx0208.1983-0,-baekmukttf-batang-medium-r-normal--34-*-*-*-*-*-ksc5601.1987-0,-*-times-medium-r-normal--34-*-*-*-*-*-*-*,-*-*-medium-r-normal--34-*-*-*-*-*-*-*,*--34-*-*-times-medium-r-normal--16-*-*-*-*-*-*-*,-*-*-medium-r-normal--16-*-*-*-*-*-*-*,*--16-*"
to type FontSet
Warning: Missing charsets in String to FontSet conversion
Warning: Unable to load any usable fontset
Warning: Missing charsets in String to FontSet conversion
Warning: Unable to load any usable fontset

and when I select File->Open (or Merge or Save As or Export) xfig crashes and
print this error message:

Error: Aborting: no fontset found

If I remove all the noto-sans-cjk-fonts, then xfig works again.

Whatever is causing the problem apparently it got fixed in tumbleweed (xfig
works fine also with noto-sans-cjk-fonts installed). It would be good to apply
the fix to 15.0 too.