7bda76367f
Some functions don't have the `FunctionType` set. We can't look these up and won't be able to call them, so ignore them when caching the function names. This does fix the failures caused by https://github.com/llvm/llvm-project/pull/153160 mentioned in https://github.com/llvm/llvm-project/pull/153160#issuecomment-3183062431. However, in `lldb-shell::msstl_smoke.cpp` there's another failure not introduced by #153160 (fixed with #153386).