mame	2017-11-04 22:05:05 +0900 (Sat, 04 Nov 2017)

  New Revision: 60646

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=60646

  Log:
    test/ruby/test_io.rb (test_write_no_garbage): Add detailed message
    
    I saw this test failed once.  There is no problem if `before > after`
    but we cannot check it.  To allow diagnosis in future, the detailed
    message is added.

  Modified files:
    trunk/test/ruby/test_io.rb
Index: test/ruby/test_io.rb
===================================================================
--- test/ruby/test_io.rb	(revision 60645)
+++ test/ruby/test_io.rb	(revision 60646)
@@ -3656,7 +3656,7 @@ __END__ https://github.com/ruby/ruby/blob/trunk/test/ruby/test_io.rb#L3656
           s = w.syswrite(buf)
           after = ObjectSpace.count_objects(res)[:T_STRING]
           assert_equal before, after,
-            'no strings left over after write [ruby-core:78898] [Bug #13085]'
+            "no strings left over after write [ruby-core:78898] [Bug #13085]: #{ before } strings before write -> #{ after } strings after write"
           assert_not_predicate buf, :frozen?, 'no inadvertent freeze'
           assert_equal buf.bytesize, n, 'IO#write wrote expected size'
           assert_equal s, n, 'IO#syswrite wrote expected size'

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