[alexey-salmin]

> I am very curious, if these bugs are that common then why don’t we see more programs with weird bugs when they are running and especially having them be documented?

Any given program has N "native" bugs and M bugs introduced by the compiler. I think as long as N >> M you won't really notice. Even if you stumble across a compiler bug by chance, proving it is a nightmare: there's so much UB everywhere that any possible output is technically correct. Exceptions are compiler crashes but those are rare.

In my experience most of compiler bugs were found by well-tested and proven software during the update of the compiler version or switching compilers. That kind corresponds to the prerequisite of "N is small".