Greg Blomquist created PROTON-1660:
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             Summary: The gemspec dependency on "json ~> 0" breaks anyone 
dependning on a recent version of json
                 Key: PROTON-1660
                 URL: https://issues.apache.org/jira/browse/PROTON-1660
             Project: Qpid Proton
          Issue Type: Bug
            Reporter: Greg Blomquist


https://github.com/apache/qpid-proton/blob/0790bb99fabc4a6d7c1c12fb09c0ff76a3594f5a/proton-c/bindings/ruby/qpid_proton.gemspec.in#L31
 

This line was recently changed in qpid-proton master. It causes any project 
that depends on a recent version of json to break when pulling together 
dependencies. The pessimistic style of version constraint means that 
qpid-proton requires a json version of >= 0.0, but < 1. 

For instance, our project has a dependency on json 2.x. And, we see this error 
when bundling with qpid-proton: 

{code:text} 
Bundler could not find compatible versions for gem "json": 
  In Gemfile: manageiq-providers-azure was resolved to 0.1.0, 
  which depends on azure-armrest (~> 0.9.1) was resolved to 0.9.1, which 
depends on json (~> 2.0.1) 
  qpid_proton (~> 0.18) was resolved to 0.18.0, which depends on json (~> 0) 
{code}



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