[clang] [Clang] Instantiate the correct lambda call operator (PR #110446)

[Chuanqi Xu via cfe-commits]

================
@@ -1631,13 +1631,39 @@ static bool allLookupResultsAreTheSame(const 
DeclContext::lookup_result &R) {
 static NamedDecl* getLambdaCallOperatorHelper(const CXXRecordDecl &RD) {
   if (!RD.isLambda()) return nullptr;
   DeclarationName Name =
-    RD.getASTContext().DeclarationNames.getCXXOperatorName(OO_Call);
-  DeclContext::lookup_result Calls = RD.lookup(Name);
+      RD.getASTContext().DeclarationNames.getCXXOperatorName(OO_Call);
 
+  DeclContext::lookup_result Calls = RD.lookup(Name);
   assert(!Calls.empty() && "Missing lambda call operator!");
   assert(allLookupResultsAreTheSame(Calls) &&
          "More than one lambda call operator!");
-  return Calls.front();
+
+  // If we have multiple call operators, we might be in a situation
----------------
ChuanqiXu9 wrote:

```suggestion
  // FIXME: If we have multiple call operators, we might be in a situation
```

https://github.com/llvm/llvm-project/pull/110446
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