Issue #5768 has been reported by Yui NARUSE.

----------------------------------------
Bug #5768: TestRequire#test_race_exceptionで競合するケースがまだある
https://bugs.ruby-lang.org/issues/5768

Author: Yui NARUSE
Status: Assigned
Priority: Normal
Assignee: Nobuyoshi Nakada
Category: 
Target version: 
ruby -v: ruby 2.0.0dev (2011-12-16 trunk 34058) [x86_64-freebsd9.0]


まだrequireで競合するケースが残っています。
現在のテストだと確率的にしか起きませんが、以下の通り変更すると確実に起きるようになります。

diff --git a/test/ruby/test_require.rb b/test/ruby/test_require.rb
index 9186a6f..262a5ef 100644
--- a/test/ruby/test_require.rb
+++ b/test/ruby/test_require.rb
@@ -352,7 +352,7 @@ class TestRequire < Test::Unit::TestCase
 TestRequire.scratch << :pre
 Thread.pass until t2 = TestRequire.scratch[1]
 Thread.pass until t2.stop?
-open(__FILE__, "w") {|f| f.puts "TestRequire.scratch << :post"}
+open(__FILE__, "w") {|f| f.puts "TestRequire.scratch << :post"; f.puts "t1,t2=TestRequire.scratch[1, 2];if Thread.current == t2; Thread.pass until t1.stopped?; end"}
 raise "con1"
     EOS
     tmp.close
@@ -364,6 +364,7 @@ raise "con1"
     t2_res = nil
 
     t1 = Thread.new do
+      scratch << t1
       begin
         require(path)
       rescue RuntimeError
@@ -389,8 +390,8 @@ raise "con1"
     assert_nothing_raised(ThreadError, bug5754) {t1.join}
     assert_nothing_raised(ThreadError, bug5754) {t2.join}
 
-    assert_equal(true, (t1_res ^ t2_res), bug5754)
-    assert_equal([:pre, t2, :post, :t2, :t1], scratch, bug5754)
+    assert_equal(true, (t1_res ^ t2_res), bug5754 + " t1:#{t1_res} t2:#{t2_res}")
+    assert_equal([:pre, t1, t2, :post, :t2, :t1], scratch, bug5754)
   ensure
     tmp.close(true) if tmp
   end


-- 
http://redmine.ruby-lang.org