Possible reasons for segmentation fault on function exit

What possible reasons can you think of for a segmentation fault on exiting a function in C++? What I mean by that is, that I have a reproducible segmentation fault in a C++ program, and when I investiga开发者_StackOverflow社区te using GDB is says

 Program received signal SIGSEGV, Segmentation fault.
 FooBar (bla=...) at foo.cpp:59
 59     }

where the indicated line contains the closing bracket of my function.

There could be many reasons of this. Run program under Valgrind and most likely it will tell you exact reason or at least will help to investigate and narrow down the problem.

It's quite likely a buffer overrun on some buffer located on your stack. This overwrites the return address, so when your code tries to return to the previous stack frame, it instead jumps to some random address which is more likely than not non-executable, so you get a segmentation fault.

But without seeing some more code or more information about the crash, it's impossible to say what the exact cause is.

My first guess is the destructor of a class is freeing an invalid pointer.

in my case I had an std::thread that had not been properly joined.