Due to the memory unsafety of C++, memory debuggers are absolutely used, including valgrind's memcheck and the Google sanitizers. Memory leaks and double frees

Due to the memory unsafety of C++, memory debuggers are absolutely used, including valgrind's memcheck and the Google sanitizers. Memory leaks and double frees are easier to avoid in C++ than C even without tooling, but use-after-free (for example) is absolutely a problem. And "modern" C++ won't necessarily help you here: even heard of string_view, span, or ranges? Memory debuggers are also often used in conjunction with fuzzing to track down bugs that the compiler may not tell you about.