Application using fontconfig print warning: 'invalid match target "scan"' related to file /etc/fonts/conf.d/80-delicious.conf . There is tag <match target="scan"> in the file, probably it should be <match target="pattern"> if I guess well. Reproducible: Always
man page: If 'target' is set to "scan", then this element applies when the font is scanned to build the fontconfig database. what version of fontconfig? what application? emerge --info.