TPPPP72 wrote:

> Rather than fixing the symptom, this PR needs to fix the source.
> 
> The test case in the original actually has an error, and often an error 
> results in an invalid data. So I looked at the code you're working with, and 
> the real cause of this crash is that we're trying to do this kind of analysis 
> on an invalid object.
> 
> I think the correct fix will be something like checking for an invalid decl 
> before trying to process documentation comments, and possibly emitting a 
> warning or error if you think it helps.

My modification is based on shafik's solution in the original issue, but from 
this perspective, a null pointer shouldn't exist here in the first place. Is it 
feasible to trace back to getParamVars?

https://github.com/llvm/llvm-project/pull/183274
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