[ryandrake]

TBH it’s not pedantic to understand the difference between undefined, implementation-defined, and unspecified behavior. It’s part of knowing the language. One of my standard interview questions for C candidates is to ask them to describe and provide an example of each.

[Dylan16807]

Is there really a meaningful difference between implementation-defined and unspecified? I'd say they're shades of gray based on how pedantic the compiler documentation is.