ADDITIONAL SYSTEM INFORMATION :
OS:
- Windows 10 Pro (Version: 1803) 64 bit
- Ubuntu 18.04 LTS 64 bit

Java:
- 11.0.1 2018-10-16 LTS
- 1.8.0_181

A DESCRIPTION OF THE PROBLEM :
I have a class, which extends a class and implements an interface. The interface has a method with a generic parameter at the method. The superclass has a method with the same signature except that the generic parameter is at the class. When I run the compiler the compilation fails with an error:
C is not abstract and does not override abstract method getValue() in I

The Compiler of the current eclipse version (2018-09 (4.9.0)) compiles without errors.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile the sourcecode from the testcase.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Compilation is successful
ACTUAL -
Compilation fails with error:
Error:(1, 8) java: C is not abstract and does not override abstract method <T>getValue() in I

---------- BEGIN SOURCE ----------
public interface I {
  <T> T getValue();
}

public abstract class AC<T> {
  public T getValue() { return null; }
}

public class C extends AC<Integer> implements I {
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
You can move the generic Parameter from the method in the interface to the Interface:

public interface I<T> {
  T getValue();
}