[clang] [clang][Sema] decay functions to pointers for qualifier discarding and overflow behavior (PR #183616)

[via cfe-commits]

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@@ -17649,6 +17651,9 @@ bool Sema::DiagnoseAssignmentResult(AssignConvertType ConvTy,
   case AssignConvertType::CompatibleOBTDiscards:
     return false;
   case AssignConvertType::IncompatibleOBTKinds: {
+    if (SrcType->isArrayType() || SrcType->isFunctionType()) {
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NeKon69 wrote:

Oh you want an assertion for `CompatibleOBTDiscards`? like `llvm_unreachable`? 

https://github.com/llvm/llvm-project/pull/183616