Implementor codelens shows <<MISSING COMMAND>> when typing

[fbricon]

Have a class like

public class MyClass {
    interface IFace {}
}

when a character is typed below the interface declaration, the implementor codelens shows <<MISSING COMMAND>>

[fbricon]

For some reason, in CodeLensHandle.resolve, IJavaElement element = JDTUtils.findElementAtSelection(unit, ((Double)position.get("line")).intValue(), ((Double)position.get("character")).intValue()) returns null. Which can be traced back to JDTUtils:

public static IJavaElement[] findElementsAtSelection(ITypeRoot unit, int line, int column) throws JavaModelException {
    if (unit == null) {
         return null;
    }
    int offset = JsonRpcHelpers.toOffset(unit.getBuffer(), line, column);
    if (offset > -1) {
         return unit.codeSelect(offset, 0);// <-- returns null
    }
   ...
}

[fbricon]

Fixed with eclipse-jdtls/eclipse.jdt.ls@063e8e1