As the other person pointed out, these are two different things. Sanitizers add runtime checks (with zero consideration for performance - don’t use these in productions). Static analysis runs at compile time, and while both GCC and Clang are doing amazing jobs of it, it’s still very easy to run into trouble. The mostly catch the low-hanging fruit.

The technical reason is that Rust-the-language gives the compiler much more information to work with, and it doesn’t look like it is possible to add this information to the C or C++ languages.