What does the "bus error" message mean, and how does it differ from a segfault?
I'd like to add a simple explanation for both: Segmentation fault means that you are trying to access memory that you are not allowed to (e. g. it's not part of your program). However, on a bus error it usually means that you are trying to access memory that does not exist (e. g. you try to access an address at 12G but you only have 8G memory) or if you exceed the limit of usable memory.