[clang] [Clang] Fix an integer overflow issue in computing CTAD's parameter depth (PR #128704)

[Younan Zhang via cfe-commits]

zyn0217 wrote:

> Need to add a release note as it fixes an existing issue.

Do you think we need a backport? If so, we can add the release note in the backport PR

https://github.com/llvm/llvm-project/pull/128704