[clang] [C++20] [Modules] [Serialization] Delay marking pending incomplete decl chains until the end of `finishPendingActions`. (PR #121245)

[Chuanqi Xu via cfe-commits]

ChuanqiXu9 wrote:

> Can you reduce your modules test case into a self contained project with build system?
> 
> If so, you can use [cvise](https://github.com/marxin/cvise) for reducing a whole project directory recursively in one invocation.

I didn't know this before. It sounds great. If you'd like, would you like to write a simple example document to explain how users do in https://clang.llvm.org/docs/StandardCPlusPlusModules.html? I believe it will be pretty helpful.

https://github.com/llvm/llvm-project/pull/121245