From: Justin Fitzsimmons <redmine@...>
Date: 2010-07-22T23:59:24+09:00
Subject: [ruby-core:31445] [Backport #3602] stdout not set in rubyw.exe, causes silent failures

Backport #3602: stdout not set in rubyw.exe, causes silent failures
http://redmine.ruby-lang.org/issues/show/3602

Author: Justin Fitzsimmons
Status: Open, Priority: Normal

Attempting to write anything to stdout will cause the program to silently crash when executed with rubyw.exe on windows.

The problem is trivial to duplicate:

Source:

f = File.new("test.txt", "w")
f.write("failure")
f.close
puts "Hello, World"
f = File.new("test.txt", "w")
f.write("success")
f.close

------------------------------

Execution output:

C:\>ruby test.rb
Hello, World

C:\>type test.txt
success


C:\>rubyw test.rb

C:\>type test.txt
failure

-----END OUTPUT----------------

This bug is not present in the 1.9.1 build of ruby for windows. A workaround is available, by providing a valid file descriptor for stdout, e.g. $stdout = File.new("stdout.txt", "w").


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