The problem with undefined behavior is that there are about 200 of them in the C language spec, and I can remember only 3 or 4 at any given time (signed integer

The problem with undefined behavior is that there are about 200 of them in the C language spec, and I can remember only 3 or 4 at any given time (signed integer overflow, dereferencing NULL, out-of-bounds array access). And I can't remember which ones are "undefined behavior", and which ones are "implementation defined". Sometimes I remember more when I use it a lot, then I forget most of them when I shift to projects using other languages. This means my ability to write correct, non-trivial C code is basically zero.