Hello, I got this bug report
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=797285
the big news is migration to gcc5 and also libstdc++6 (ABI breakage for public API when you use string ans list).
This bug report is RC from the point of view of Debian, so it means, that if nothing is done, tango will be removed from Debian testing in order to not delay the gcc transition.
If you need more information about Debian migrations, do not hesitate to ask.
cheers
Frederic
Here my build log
Fixed in SVN. Will be visible in next release
Fixed in Tango 9