C++ is safe if you know how to use it properly, but this does incur overhead and many people aren't willing to incur any overhead because they want the fastest raw speed available. So they usually mess around with C like constructs in their C++ programs.
Pascal OTOH is 100% safe no matter what you do because you can't access pointers directly or do pointer math or out-of-bounds array access. The pointers available in Pascal are "managed" pointers which prevent you from accessing the underlying machine hardware.
This all incurs a little overhead, but you won't find any insecure Pascal programs due to memory mismanagement.
