This is an indication -- not proof, but indication -- of an out-of-synch library as described in FAQ 15.4.1:
Code:
xombrero:/usr/local/lib/libestdc++.so.14.0: /usr/lib/libstdc++.so.56.0 : WARNING: symbol(_ZN11__gnu_debug17_S_debug_messagesE) size mismatch, relink your program