Parser fails when accessing property/method called 'end'

Consider the following:

declare Foo
end : String
end

rule "foo" dialect "java"
when
then
foo = new Foo()
e = foo.end()
end

The compiler fails with the following error: [xx,yy]: [ERR 102] Line xx:yy mismatched input '('

If the rule is changed to (ie, remove the parens on the 'end')

rule "foo" dialect "java"
when
then
foo = new Foo()
e = foo.end
end

The compiler error is: [0,-1]: [ERR 101] Line 0:-1 no viable alternative at input '<eof>'