[clang-tools-extra] [clangd] Avoid crash when summarizing pointer-to-member expr for block-end hint (PR #76492)

[Haojian Wu via cfe-commits]

https://github.com/hokein approved this pull request.

Thanks. Can you add your analysis (https://github.com/clangd/clangd/issues/1873#issuecomment-1870902480) to the commit description, I think it is useful to have it in the commit log. 

btw, it looks like there is a FIXME (https://github.com/llvm/llvm-project/blob/main/clang/lib/AST/ExprCXX.cpp#L677) for supporting this particular case. 


https://github.com/llvm/llvm-project/pull/76492