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Backport #3853

Updated by jeremyevans0 (Jeremy Evans) 12 months ago

=begin 
  
  * File.read(path) sometimes returns empty string although file is not empty 
  * File.read(path, File.size(path)) somtimes returns nil although file is not empty 
 
  It seems as if the file reached eof. This happens only when threading is used. There seems to be some kind of race condition. 
 
  Ruby version is 1.8.7-p302 (on x86_64-linux and x86-linux). 
  This problem doesn't exist on 1.9 (tested with 1.9.1p429). 
 
 =end 
 

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