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Usually failed spec because of CRuby's bug should be guard with ruby_bug.
But language/module_spec.rb fails as following only on Ruby 1.9.2.
The module keyword reopens a module included in Object ERROR
NameError: uninitialized constant ModuleSpecs::IncludedInObject::IncludedModuleSpecs::Reopened
/home/naruse/git/rubyspec/language/module_spec.rb:28:in `block (2 levels) in '
It passes on 1.8 and 1.9.3 or later.
Moreover 1.9.2 won't backport non security issues.
How should I do on such case?
So the problem is that the ruby_bug expects a single, continuous version range and this bug has a discontinuous version range. These casen are very rare. I think there are only one or two others. At some point, I may change ruby_bug to take ranges or something. For now, use a shared spec and one ruby_bug guard in a ruby_version_is guard for the range that fails, and other ruby_version_is guards for the ranges that don't fail.