Okay, I have played with it more.. Guess what? Hin-Tak is right about
rename the name do cause the trouble for freetype2 2.1.10 with no
patch. The old freetype2 do accept the rename but not now in freetype2
2.1.10.
no-crash: Run those..
# cd /usr/X11R6/lib/X11/fonts/webfonts
# rm fonts.*
# mkfontscale
# mkfontdir
# fc-cache -f -v
crash: Same way above, but rename all microsoft and monotype to
webfonts.
no-crash: Edit x11-fonts/webfonts/Makefile by remove the rename
microsoft and monotype part. Just leave name default.
crash: Leave x11-fonts/webfonts/Makefile alone and let rename
microsoft and monotype to webfonts.
I think I am going to modify webfonts to use mkfontscale and mkfontdir
since it comes with xorg and remove the rename part. Then contact to
the maintainer with patch.