Issue #6990 has been updated by luislavena (Luis Lavena). =begin I can confirm that after reaching 1.9GB of RAM usage, it fails with: "7e7e6cb0" C:/Users/Worker/Code/ruby-2.0.0-r36949-x64-mingw32/lib/ruby/2.0.0/securerandom.rb:116:in `random_bytes': unknown error - CryptGenRandom failed: The parameter is incorrect. (SystemCallError) from a.rb:7:in `block in <main>' from a.rb:11:in `loop' from a.rb:11:in `<main>' I'm applying the patch now and doing a build to confirm. =end ---------------------------------------- Bug #6990: test_s_random_bytes_without_openssl error on Windows x64 https://bugs.ruby-lang.org/issues/6990#change-29246 Author: h.shirosaki (Hiroshi Shirosaki) Status: Open Priority: Normal Assignee: Category: Target version: ruby -v: ruby 2.0.0dev (2012-09-06 trunk 36917) [x64-mingw32] =begin TestSecureRandom sometimes has an error on ci.rubyinstaller. http://ci.rubyinstaller.org/job/ruby-trunk-x64-test-all/41/console 3) Error: test_s_random_bytes_without_openssl(TestSecureRandom): SystemCallError: unknown error - CryptGenRandom failed: The parameter is incorrect. C:/Users/Worker/Jenkins/workspace/ruby-trunk-x64-build/lib/securerandom.rb:116:in `random_bytes' C:/Users/Worker/Jenkins/workspace/ruby-trunk-x64-build/test/test_securerandom.rb:12:in `test_s_random_bytes' C:/Users/Worker/Jenkins/workspace/ruby-trunk-x64-build/test/test_securerandom.rb:97:in `block in test_s_random_bytes_without_openssl' C:/Users/Worker/Jenkins/workspace/ruby-trunk-x64-build/lib/tmpdir.rb:88:in `mktmpdir' C:/Users/Worker/Jenkins/workspace/ruby-trunk-x64-build/test/test_securerandom.rb:85:in `test_s_random_bytes_without_openssl' This error seems to occur only on x64. I guess the following scenario. Pointer size of @hProv seems limited to 32bit with x64 ruby. If the pointer value was larger than 32bit max, it would fail. https://github.com/ruby/ruby/blob/trunk/lib/securerandom.rb#L106 I don't get the error at test-all on my local box, but I can get same error with the following script. It takes long time to get the error. require "openssl" OpenSSL.send(:remove_const, :Random) require "securerandom" i = 0 loop do SecureRandom.random_bytes SecureRandom.send(:remove_instance_variable, :@has_win32) p SecureRandom.send(:instance_variable_get, :@hProv).to_s(16) if (i % 10000) == 0 i += 1 end I attached a patch. I also fixed encoding error which occurs if error message contains Japanese characters. =end -- http://bugs.ruby-lang.org/