[Sema] TypeCheckStmt: using initContext->getBindingIndex() instead of 0

Author: hank121314

lib/Sema/TypeCheckStmt.cpp

@@ -84,10 +84,12 @@ namespace {
           return { false, E };
         // Stop the recursion if the autoclosure is already checked in
         // default initializer.
-        if (auto *initContext = dyn_cast<PatternBindingInitializer>(ParentDC))
-          if (initContext->getBinding()->isInitializerChecked(0) &&
+        if (auto *initContext = dyn_cast<PatternBindingInitializer>(ParentDC)) {
+          auto initIndex = initContext->getBindingIndex();
+          if (initContext->getBinding()->isInitializerChecked(initIndex) &&
               CE->getDiscriminator() != AutoClosureExpr::InvalidDiscriminator)
             return { false, E };
+        }
 
         assert(CE->getDiscriminator() == AutoClosureExpr::InvalidDiscriminator);
         CE->setDiscriminator(NextDiscriminator++);