Backport #4542: test_threaded_flush sometimes fails

• Status: Rejected
• Assignee: yugui (Yuki Sonoda)

[yhara (Yutaka HARA)]

=begin
test-all of Ruby 1.9.2 p180 sometimes shows the following error:

2. Failure:
   test_threaded_flush(TestIO) [/var/home/yhara/ruby-1.9.2-p180/test/ruby/test_io.rb:1670]:
   <[""hi!""]> expected but was
   <[]>.

Unfortunately, this rarely reproduces.

• 1 of 10 tries on CentOS 5.5
• 1 on Ubuntu 10.10
  =end

[yhara (Yutaka HARA)]

=begin
I found a way to reproduce this every time:

/home/yhara/temp/ruby_1_9_2_svn % svn di
Index: test/ruby/test_io.rb

--- test/ruby/test_io.rb (リビジョン 31238)
+++ test/ruby/test_io.rb (作業コピー)
@@ -1665,7 +1665,7 @@
Thread.new {sleep 1; t.kill; p 'hi!'}
t.join
}.gsub(/^\s+/, '')

• 10.times.map do

• 100.times.map do
  Thread.start do
  assert_in_out_err([], src, [%q["hi!"]])
  end

Result:

/home/yhara/temp/ruby_1_9_2_svn % make test-all TESTS=test/ruby/test_io.rb
./miniruby -I./lib -I.ext/common -I./- -r./ext/purelib.rb ./tool/runruby.rb --extout=.ext -- "./test/runner.rb" test/ruby/test_io.rb
Loaded suite ./test/runner
Started
....................................................................................F........
Finished in 9.047658 seconds.

1. Failure:
   test_threaded_flush(TestIO) [/home/yhara/temp/ruby_1_9_2_svn/test/ruby/test_io.rb:1670]:
   <[""hi!""]> expected but was
   <[]>.

93 tests, 431 assertions, 1 failures, 0 errors, 0 skips

Test run options: --seed 49147
make: *** [yes-test-all] エラー 1

=end

[nagachika (Tomoyuki Chikanaga)]

• Tracker changed from Bug to Backport
• Status changed from Open to Assigned
• Assignee set to yugui (Yuki Sonoda)

=begin
Hi,
In trunk, test_threaded_flush was modified by r29022, and it's not backported to ruby_1_9_2 branch yet.
Merging r29022 will fix this error.
=end

[kosaki (Motohiro KOSAKI)]

• Project changed from 13 to 12
• Category changed from core to core
• Target version deleted (2.0.0)

The assigned project changed from backport93 to backport92. this fix is already applied to 1_9_3 branch.

[naruse (Yui NARUSE)]

• Status changed from Assigned to Rejected