How to understand why signal 11 happening?

I dont understand why signal 11 is coming. Error includes like some adress which I dont understand what means, so its look like;

lib/libstdc++.so.6(ZNSs6append + 0x14) [0x34c7ca44]
man(_ZstplIcSt11char_traitsI.....)[0x106a18]

What is "[0x34c7ca44]" Can I understand where is my wrong and How*