COMMIT || means "no arguments" in a block. See JRUBY-4665.	http://github.com/rubyspec/rubyspec/commit/bb5a398797f3307010c3fbf60e8a0a3d4189cefa

===================================================================
+++ 20100405T103851
@@ 11 @@
 URL: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8
 ?\227?\131?\170?\227?\131?\157?\227?\130?\184?\227?\131?\136?\227?\131?\170?\227?\129?\174?\227?\131?\171?\227?\131?\188?\227?\131?\136: http://svn.ruby-lang.org/repos/ruby
 ?\227?\131?\170?\227?\131?\157?\227?\130?\184?\227?\131?\136?\227?\131?\170 UUID: b2dd03c8-39d4-4d8f-98ff-823fe69b080e
+?\227?\131?\170?\227?\131?\147?\227?\130?\184?\227?\131?\167?\227?\131?\179: 27218
 ?\227?\131?\142?\227?\131?\188?\227?\131?\137?\231?\168?\174?\229?\136?\165: ?\227?\131?\135?\227?\130?\163?\227?\131?\172?\227?\130?\175?\227?\131?\136?\227?\131?\170
 ?\230?\186?\150?\229?\130?\153?\228?\184?\173?\227?\129?\174?\229?\135?\166?\231?\144?\134: ?\231?\137?\185?\227?\129?\171?\227?\129?\170?\227?\129?\151
 ?\230?\156?\128?\231?\181?\130?\229?\164?\137?\230?\155?\180?\232?\128?\133: nobu
@@ 6992 @@
 test_local_barrier(TestThread): .
 test_mutex_deadlock(TestThread): .
 test_mutex_fifo_like_lock(TestThread): .
+test_mutex_illegal_unlock(TestThread): /Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/ruby/test_thread.rb:327:in `unlock': not owner (ThreadError)
+	from /Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/ruby/test_thread.rb:327:in `test_mutex_illegal_unlock'
+	from /Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/ruby/test_thread.rb:9
 F
 test_mutex_interrupt(TestThread): .
 test_mutex_synchronize(TestThread): .
@@ 7705 @@
     /Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/openssl/test_x509cert.rb:189:in `test_dsa_with_sha2'
 
  <n>)  Failure:
+test_mutex_illegal_unlock(TestThread) [/Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/ruby/test_thread.rb:325]:
 <ThreadError> exception expected but was
+Class: <SystemExit>
+Message: <Class: <ThreadError>
+Message: <"not owner">
 ---Backtrace---
+/Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/ruby/test_thread.rb:327:in `unlock'
+/Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/ruby/test_thread.rb:327:in `test_mutex_illegal_unlock'
+/Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/ruby/test_thread.rb:9
+--------------->
 ---Backtrace---
+/Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/ruby/test_thread.rb:327:in `join'
+/Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/ruby/test_thread.rb:326:in `test_mutex_illegal_unlock'
+/Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/ruby/test_thread.rb:325:in `test_mutex_illegal_unlock'
 ---------------
 
  <n>)  Failure:
@@ 7747 @@
     /Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/webrick/utils.rb:46:in `start_httpserver'
     /Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/webrick/test_filehandler.rb:79:in `test_filehandler'
 
+2520 tests, 1349133 assertions, 2 failures, 3 errors
 make: *** [test-all] Error 1
 exit 2
 failed(test-all)
@@ 20308 @@
 /Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/rubyspec/language/block_spec.rb
 A block with mismatched arguments
 - Should fill in unsupplied arguments with nil
+- raises ArgumentError if argument is passed, but the block takes none
 
 A block with a 'rest' arg
 - collects all of the arguments passed to yield
@@ 37186 @@
 
 Finished in <t> seconds
 
+3148 files, 12552 examples, <num> expectations, 92 failures, 95 errors
 exit 1
 failed(rubyspec)
 == end # <time>

===================================================================
--- 20100404T104147
@@ 11 @@
 URL: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8
 ?\227?\131?\170?\227?\131?\157?\227?\130?\184?\227?\131?\136?\227?\131?\170?\227?\129?\174?\227?\131?\171?\227?\131?\188?\227?\131?\136: http://svn.ruby-lang.org/repos/ruby
 ?\227?\131?\170?\227?\131?\157?\227?\130?\184?\227?\131?\136?\227?\131?\170 UUID: b2dd03c8-39d4-4d8f-98ff-823fe69b080e
-?\227?\131?\170?\227?\131?\147?\227?\130?\184?\227?\131?\167?\227?\131?\179: 27214
 ?\227?\131?\142?\227?\131?\188?\227?\131?\137?\231?\168?\174?\229?\136?\165: ?\227?\131?\135?\227?\130?\163?\227?\131?\172?\227?\130?\175?\227?\131?\136?\227?\131?\170
 ?\230?\186?\150?\229?\130?\153?\228?\184?\173?\227?\129?\174?\229?\135?\166?\231?\144?\134: ?\231?\137?\185?\227?\129?\171?\227?\129?\170?\227?\129?\151
 ?\230?\156?\128?\231?\181?\130?\229?\164?\137?\230?\155?\180?\232?\128?\133: nobu
@@ 6992 @@
 test_local_barrier(TestThread): .
 test_mutex_deadlock(TestThread): .
 test_mutex_fifo_like_lock(TestThread): .
-test_mutex_illegal_unlock(TestThread): .
 test_mutex_interrupt(TestThread): .
 test_mutex_synchronize(TestThread): .
 test_mutex_trylock(TestThread): .
@@ 7727 @@
     /Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/webrick/utils.rb:46:in `start_httpserver'
     /Users/chkbuild/chkbuild/tmp/build/ruby-1.8-pth/<buildtime>/ruby/test/webrick/test_filehandler.rb:79:in `test_filehandler'
 
-2520 tests, 1349133 assertions, 1 failures, 3 errors
 make: *** [test-all] Error 1
 exit 2
 failed(test-all)
@@ 37165 @@
 
 Finished in <t> seconds
 
-3148 files, 12551 examples, <num> expectations, 92 failures, 95 errors
 exit 1
 failed(rubyspec)
 == end # <time>