Method#super_method finds something when super is undef'ed #2155
Description
The last assertion in this test (from mri/ruby/test_method.rb) fails:
def test_super_method_removed
c1 = Class.new {private def foo; end}
c2 = Class.new(c1) {public :foo}
c3 = Class.new(c2) {def foo; end}
c1.class_eval {undef foo}
m = c3.instance_method(:foo)
m = assert_nothing_raised(NameError, Feature9781) {break m.super_method}
assert_nil(m, Feature9781)
endundef installs an UndefinedMethod, and Method#super_method checks for UndefinedMethod, so I'm not sure what's broken here. Here's the output
TestMethod#test_super_method_removed [/Users/headius/projects/jruby/test/mri/ruby/test_method.rb:857]:
[ruby-core:62202] [Feature #9781].
Expected #<UnboundMethod: #<Class:0x36c56a77>#foo> to be nil.