[vanekl]

Worst: c/c++ pointer memory errors, duh. Especially when there are thousands of pointers and don't know which one is overwriting memory that it shouldn't be overwriting.

Second worst: linking c programs when some of the symbols are duplicated in more than one library yet are defined differently, Nobody mentioning this to the developer made it all the more exciting.

[nwatson]

Thanks to the Boost.org developers the C++ pointer issues are mostly a thing of the past. Using shared_ptr et. al. for all but the most time-critical code has made memory-smashing, memory leaks, etc. so easy to avoid!