[clang] [LifetimeSafety] Track origins through std::function (PR #191123)

[Gábor Horváth via cfe-commits]

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@@ -395,6 +404,15 @@ void FactsGenerator::handleAssignment(const Expr *LHSExpr,
     } else
       markUseAsWrite(DRE_LHS);
   }
+  if (!RHSList) {
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Xazax-hun wrote:

Interestingly, `std::function` used to have an `assign` method that got removed later. Maybe it is not that important to handle it given that it was removed.

https://github.com/llvm/llvm-project/pull/191123