[clang] [clang][ExprEngineCXX] Fix crash on dereference invalid return value of getAdjustedParameterIndex() (PR #83585)

[Ella Ma via cfe-commits]

Snape3058 wrote:

Add suggested reviewers for this PR. I am unfamiliar with the engine code.

> mzyKi force-pushed the bugfix/crash-on-getAdjustedParameterIndex branch

Please do not force push to your forked repo later after receiving suggestions from other reviewers. This will make previous suggestions hard to track. We have the *squash and merge* functionality to merge all the commits on your branch into one commit in the LLVM repo when everything is done.

https://github.com/llvm/llvm-project/pull/83585