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writing the new body can cause the response to be committed and the

request thread to return up the stack before the instance variable is
assigned.  Synchronize so that the ivar is assigned before the other
thread can activate.

fixes #10984
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1 parent b407839 commit de20a6d15ac98464b87e8be9a493050b741e2fd2 @tenderlove tenderlove committed Jun 28, 2013
Showing with 3 additions and 1 deletion.
  1. +3 −1 actionpack/lib/action_dispatch/http/response.rb
4 actionpack/lib/action_dispatch/http/response.rb
@@ -198,7 +198,9 @@ def body=(body)
if body.respond_to?(:to_path)
@stream = body
- @stream = build_buffer self, munge_body_object(body)
+ synchronize do
+ @stream = build_buffer self, munge_body_object(body)
+ end

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