Source: xbubble The package emits license-problem-font-adobe-copyrighted-fragment-no-credit due to the file baskvli.pfb
Investigaing, as in https://wiki.debian.org/qa.debian.org/type1nondfsg, seems that xbubble is affected: $t1disasm data/baskvli.pfb | less -- snip -- % Copyright (c) 1987 Adobe Systems Incorporated. % All rights reserved. % This code to be used for Flex and hint replacement. /OtherSubrs [systemdict /internaldict known {1183615869 systemdict /internaldict get exec /FlxProc known {save true} {false} ifelse} {userdict /internaldict known not { userdict /internaldict -- snip -- -- System Information: Debian Release: stretch/sid APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'testing'), (500, 'stable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.3.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=de_DE.utf8, LC_CTYPE=de_DE.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system)