super in instance_eval in a method defined in a module is invoked with a wrong receiver
super in instance_eval in a method defined in a module is invoked with a wrong receiver:
class Foo def initialize @foo = :foo end def foo p [self, @foo] end end module M def foo x = Object.new x.instance_eval do super end end end class Bar < Foo include M end Bar.new.foo
The output should be [#Foo:..., :foo] or an exception.
Matz prefer the former (https://twitter.com/yukihiro_matz/status/659913844861464576).
Updated by jeremyevans0 (Jeremy Evans) 4 days ago
This is still a bug in the master branch. Attached is a patch that
fixes it, making the behavior for super in instance_eval in method
in module the same as super in instance_eval in method in class,
raising a TypeError.
This is implemented by keeping a reference to the including class
when creating all iclasses, and using that reference in the check
for expected class in the super check.
Note that the approach Ruby uses in this check is not robust. If
you instance_eval another object of the same class and call super,
instead of a TypeError, you get super called with the
instance_eval receiver instead of the method receiver. Truly
fixing super would require keeping a reference to the super object
(method receiver) in each frame where scope has changed, and using
that instead of current self when calling super.