I'm definitely open to the idea that C and C++ have problems, but the things listed in this article aren't them. He lists some very weird behavior by the clang compiler, and then blames it on C despite the fact that in my mind they're clearly misfeatures of clang. He talks about uncertainty of arithmetic overflow... unless I've missed something, every chip architecture that 99% of programmers will ever encounter uses two's complement, so the undefined behavior he talks about is in practice defined.

He says:

But not all systems where C and C++ run have hardware memory protection. For example, I wrote my first C and C++ programs using Turbo C on an MS-DOS system. Reading or writing a null pointer did not cause any kind of fault: the program just touched the memory at location zero and kept running. The correctness of my code improved dramatically when I moved to a Unix system that made those programs crash at the moment of the mistake. Because the behavior is non-portable, though, dereferencing a null pointer is undefined behavior.

This is the same thing. He's taking something that's been a non-issue in practice for decades and deciding it's an issue again. Yes, programming in C has some huge and unnecessary difficulties on non-memory-protected systems. The next time I'm working on that MS-DOS project, I'll be sure to do it in Python to avoid those difficulties. OH WAIT

Etc etc. C++ actually has enough big flaws to fill an essay ten times this long about things that cause active pain to working programmers every day... but no, we're unhappy that arithmetic overflow depends on the machine's reliably-predictable behavior, instead of being written into the C standard regardless overriding the machine architecture. It just seems like a very weird and esoteric list of things to complain about.

Edit: Actually, I thought about it, and I don't think clang's behavior is wrong in the examples he cites. Basically, you're using an uninitialized variable, and choosing to use compiler settings which make that legal, and the compiler is saying "Okay, you didn't give me a value for this variable, so I'm just going to pick one that's convenient for me and do my optimizations according to the value I picked." Is that the best thing for it to do? Maybe not; it certainly violates the principle of least surprise. But, it's hard for me to say it's the compiler's fault that you constructed a program that does something surprising when uninitialized variables you're using happen to have certain values.

My problem with C/C++ is the people behind the spec have sacrificed our sanity in the name of "compiler optimization". Signed overflow behaves the same on every cpu on the planet, why is it undefined behaviour? Even more insane, they specify intN_t must be implemented via 2s complement.. but signed overflow is still undefined because compilers want to pretend they run on pixie dust instead of real hardware.

Great read! But yes, that's pretty much the point of C/C++ 😂