[clang] [clang][Sema] Preserve the initializer of invalid VarDecls (PR #88645)

[Matheus Izvekov via cfe-commits]

================
@@ -13456,6 +13458,15 @@ void Sema::AddInitializerToDecl(Decl *RealDecl, Expr 
*Init, bool DirectInit) {
     return;
   }
 
+  if (VDecl->isInvalidDecl()) {
+    CorrectDelayedTyposInExpr(Init, VDecl);
+    ExprResult Recovery =
+        CreateRecoveryExpr(Init->getBeginLoc(), Init->getEndLoc(), {Init});
+    if (Expr *E = Recovery.get())
----------------
mizvekov wrote:

This is ok, I see that action result's get method will return a nullptr in 
unset/failed case anyway, and we don't need to make the distinction here.

https://github.com/llvm/llvm-project/pull/88645
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