Please provide the following information:

• Version of JMockit that was used: 1.45

• Description of the problem:

Due to type inference methodToInvoke.getReturnType() will return Object.class when using lambdas, resulting in an InvocationException where the delegate returns an Object that is an instance of the targetReturnType. ie:

java.lang.IllegalArgumentException: Value of type java.util.HashMap incompatible with return type java.util.Map of MyClassr#doSomething()

• Check that:

• The problem can be reproduced by JMockit project members.
  For that, include an example test (perhaps accompanied by a Maven/Gradle build script) which
  can be executed without changes and reproduces the failure.

• The issue does not fall outside the scope of the project (for example, attempting to use JMockit
  APIs from Groovy or Scala code, or with an Android runtime).

• The JDK where the problem occurs is a final release, not a development build.