[clang] [Clang] fix crash with generic lambdas in function default args (PR #222987)

[Younan Zhang via cfe-commits]

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@@ -679,6 +679,8 @@ features cannot lower the translation-unit ABI level;
   class with an invalid non-static data member, such as one qualified with an
   address space. (#GH194605)
 
+- Fixed a crash with generic lambdas in default arguments of functions with `auto` parameters.
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zyn0217 wrote:

`(#GH48768)`

https://github.com/llvm/llvm-project/pull/222987