Stubbing a base method, will erroneously stub a child method that overrides it when that child method is in a nested block

[jcavalieri]

Subject of the issue

Stubbing a base method, will erroneously stub a child method that overrides it when that child method is in a nested call in a block.

Your environment

• Ruby version: ruby 2.4.4
• rspec-core version: 3.8.0

Steps to reproduce

Working demo here:
https://github.com/jcavalieri/rspec_issue

Running rspec ./program_spec.rb shows the failing test that should succeed

Expected behavior

Only the base implementation of the method foo should be stubbed.

Actual behavior

The base implementation of foo is stubbed, however, the child implementation of foo when in a nested block is also being stubbed.

[JonRowe]

Closing as this isn't an rspec-core issue. Will reopen on rspec-mocks.