[clang] [lldb] [llvm] [mlir] [Support] Validate number of arguments passed to formatv() (PR #105745)

[Mehdi Amini via cfe-commits]

https://github.com/joker-eph commented:

Thanks, I'm wondering about the cost of this: what does it do to some compile-time tests with clang for example?

https://github.com/llvm/llvm-project/pull/105745