Work around the problem when type inference fails and StrongTypeSystemImpl.inferGenericFunctionCall…

pkg/analyzer/lib/src/summary/link.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * This library is capable of producing linked summaries from unlinked
  * ones (or prelinked ones).  It functions by building a miniature
  * element model to represent the contents of the summaries, and then
  * scanning the element model to gather linked information and adding
  * it to the summary data structures.
@@ skipping 2354 matching lines @@
         } else {
           FunctionType rawType = StaticTypeAnalyzer
               .constructorToGenericFunctionType(constructorElement);
           FunctionType inferredType = _inferExecutableType(
               rawType,
               numNamed,
               numPositional,
               namedArgNames,
               namedArgTypeList,
               positionalArgTypes, const <DartType>[]);
-          if (identical(inferredType, rawType)) {
+          if (inferredType == null || identical(inferredType, rawType)) {
             inferredType = linker.typeSystem.instantiateToBounds(rawType);
           }
           return inferredType.returnType;
         }
       }());
     } else {
       ClassElementForLink classElement =
           unit.resolveConstructorClassRef(ref.reference).asClass;
       stack.add(classElement?.type ?? DynamicTypeImpl.instance);
     }
@@ skipping 2745 matching lines @@
    * there are no type parameters in scope.
    */
   TypeParameterizedElementMixin get _typeParameterContext;
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 
   @override
   String toString() => '$enclosingElement.$name';
 }