Most common reasons for unstable bugs in C++?

Question

I am currently working on a large project, and I spend most of the time debugging. While debugging is a normal process, there are bugs, that are unstable, and these bugs are

Answer 1

• buffer overflows
• using pointers to deleted objects
• returning invalid references or references to out of scope objects
• unhandled exceptions
• resource leaks (not only memory)

• infinite recursion

• dynamic libraries version mismatch