[CSClosure] Check multi-statement closure attrs only in if inference is enabled

Author: xedin

lib/Sema/CSApply.cpp

@@ -8053,6 +8053,12 @@ namespace {
 
                 return resultTarget;
               });
+
+          if (!hadError) {
+            TypeChecker::checkClosureAttributes(closure);
+            TypeChecker::checkParameterList(closure->getParameters(), closure);
+          }
+
           continue;
         }
 

lib/Sema/CSClosure.cpp

@@ -1445,9 +1445,6 @@ bool ConstraintSystem::applySolutionToBody(Solution &solution,
   if (application.hadError)
     return true;
 
-  TypeChecker::checkClosureAttributes(closure);
-  TypeChecker::checkParameterList(closure->getParameters(), closure);
-
   closure->setBodyState(ClosureExpr::BodyState::TypeCheckedWithSignature);
   return false;
 }