Segfaults are our friends and teachers: "If you’ve written some C, you’ve almost certainly seen a segmentation fault at some point. I spent a long time thinking of it as a ‘thing that happens when you use pointers wrong in C’. That’s mostly true, but a segmentation fault actually has a very specific meaning. You get one when a process tries to access memory in a way that it’s not allowed to, or accessing invalid memory."
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