Properties can no longer be declared as abstract

lib/member_builder.js

@@ -187,6 +187,14 @@ exports.buildProp = function( members, meta, name, value, keywords, base )
         );
     }
 
+    // abstract properties do not make sense
+    if ( keywords[ 'abstract' ] )
+    {
+        throw TypeError(
+            "Property '" + name + "' cannot be declared as abstract"
+        );
+    }
+
     getMemberVisibility( members, keywords )[ name ] = value;
 };
 

test/test-member_builder-prop.js

@@ -48,3 +48,15 @@ mb_common.assertCommon();
     }, TypeError, "Cannot override method with property" );
 } )();
 
+
+/**
+ * Abstract properties do not make sense. Simple as that.
+ */
+( function testCannotDeclareAbstractProperty()
+{
+    assert.throws( function()
+    {
+        mb_common.buildMemberQuick( { 'abstract': true } );
+    }, TypeError, "Cannot declare abstract property" );
+} )();
+