Eventually, someone (Natalie) moved the comment below the assignment, and it worked normally. I tried putting it back above, and it wouldn't compile. Can't remember what happened if I left the moved comment in place and put another above the assignment. I found two like that - one in CodeWarrior, one in Turbo Pascal a few years before that simply returned "error 0: no error."
It wasn't anything complicated in either case, just very basic stuff.
CW had a pretty nice environment to develop in compared to its contemporary competitors, but it just didn't have a solid compiler.
Removing the offending line or adding a different mix of blanks/instructions would get you back to a working state again. Very frustrating.
int x = 0;
int y = 2;
DoSomething(); // Didn't run with x before y
Only other time I bumped into it was in Idris, which is to be expected frankly.
If you ever catch them still there with a "no optimizations" flag, then that's a pretty serious bug!