You think that assembly needs less of a manual than C? You think assembly has less dark corners? You think it's going to make things simpler? My mind boggles.
Oh, and also, which assembler? 68000? x86? ARM? (One of these is not like the others in terms of complexity...)
Maybe talking about undefined behavior wasn't the best approach I could take :) But if you stick to simple machine languages then it shouldn't be a big problem. Something that is closer to Knuth's MIX than to x86 won't have much undefined behavior.
The thing that I was thinking about was that many operations that are defined in assembly language, such as integer overflow are undefined in C (and this undefined behavior is often abused by optimizing compilers) and C also abstracts over a lot of control flow conventions.
Oh, and also, which assembler? 68000? x86? ARM? (One of these is not like the others in terms of complexity...)