[ruby-core:94189] [Ruby master Bug#7833] DRb has problems with BasicObject

Issue #7833 has been updated by jeremyevans0 (Jeremy Evans).

File drb-basicobject-7833.patch added

This is still a bug in the master branch.  Attached is a patch that fixes the issue.  It's a decent size patch as there are many parts of drb that need to be modified to handle BasicObject instances.  This patch also fixes a bug in the rescue clause of any_to_s, as sprintf does not support a `%l` modifier (maybe it did at some point in the past, before 1.8.7?).

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Bug #7833: DRb has problems with BasicObject
https://bugs.ruby-lang.org/issues/7833#change-80449

* Author: prijutme4ty (Ilya Vorontsov)
* Status: Assigned
* Priority: Normal
* Assignee: seki (Masatoshi Seki)
* Target version: 
* ruby -v: 1.9.3p374
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
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I realized some problems with DRb and BasicObject
1) I cannot create front object of BasicObject class because DRb tries to call private_methods class

2) Call to DRb can't return instance of BasicObject class, instead it hangs. 

# serv.rb:
require 'drb'
$drb_uri = 'druby://localhost:1111'
class Front
  def func
   BasicObject.new
  end
end
DRb.start_service($drb_uri, Front.new)
DRb.thread.join

# conn.rb:
require 'drb'
$drb_uri = 'druby://localhost:1111'
DRb.start_service
conn = DRbObject.new_with_uri($drb_uri)
p conn.func


When after a while (tens of seconds) I break the server, client shows me trace:

>conn.rb
C:/Ruby193/lib/ruby/1.9.1/drb/drb.rb:570:in `load': connection closed (DRb::DRbConnError)
        from C:/Ruby193/lib/ruby/1.9.1/drb/drb.rb:632:in `recv_reply'
        from C:/Ruby193/lib/ruby/1.9.1/drb/drb.rb:918:in `recv_reply'
        from C:/Ruby193/lib/ruby/1.9.1/drb/drb.rb:1197:in `send_message'
        from C:/Ruby193/lib/ruby/1.9.1/drb/drb.rb:1088:in `block (2 levels) in method_missing'
        from C:/Ruby193/lib/ruby/1.9.1/drb/drb.rb:1172:in `open'
        from C:/Ruby193/lib/ruby/1.9.1/drb/drb.rb:1087:in `block in method_missing'
        from C:/Ruby193/lib/ruby/1.9.1/drb/drb.rb:1105:in `with_friend'
        from C:/Ruby193/lib/ruby/1.9.1/drb/drb.rb:1086:in `method_missing'
        from D:/programming/iogen_tools/website/server/tmp/conn.rb:5:in `<main>'


---Files--------------------------------
drb-basicobject-7833.patch (4.95 KB)


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