Re: Enjoyed FORTRAN more than any language...
Bugs come from many directions.
Bugs in C++ might perhaps come from the complexity of the language itself. Not so much Stroustrup's original C++ as-was 30 years ago, but the designed-by-committee monstrosity it grew into.
Bugs in a complex formally-verifiable system I had the misfortune to work on sometime in the '80s came from the complexity of the test framework, and the pressure that put on programmers to get it through the tests rather than get it right.