I am guessing this issue will be properly resolved when unstable debian becomes stable. It seems that official (from Lazarus) FPC 3.0.2 was compiled using unstable debian source. If you are someone from the official release team, please, could you confirm if this is the case? Also, can you imagine some alternative solution in order to avoid such problems for future releases? Newbies like me will appreciate. Thanks.
PS.: The fix is just a workaround. As noted by Marco van de Voort, there is no official release of FPC *.deb files. In other words, the Lazarus Team (not FPC Team) is redistributing a buggy .deb FPC file.