kazu	2019-02-20 16:19:39 +0900 (Wed, 20 Feb 2019)

  New Revision: 67098

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=67098

  Log:
    Fix document and return value of `IO#autoclose=`

  Modified files:
    trunk/io.c
Index: io.c
===================================================================
--- io.c	(revision 67097)
+++ io.c	(revision 67098)
@@ -8385,12 +8385,12 @@ rb_io_autoclose_p(VALUE io) https://github.com/ruby/ruby/blob/trunk/io.c#L8385
  *     f = open("/dev/null")
  *     IO.for_fd(f.fileno)
  *     # ...
- *     f.gets # may cause IOError
+ *     f.gets # may cause Errno::EBADF
  *
  *     f = open("/dev/null")
- *     IO.for_fd(f.fileno).autoclose = true
+ *     IO.for_fd(f.fileno).autoclose = false
  *     # ...
- *     f.gets # won't cause IOError
+ *     f.gets # won't cause Errno::EBADF
  */
 
 static VALUE
@@ -8402,7 +8402,7 @@ rb_io_set_autoclose(VALUE io, VALUE auto https://github.com/ruby/ruby/blob/trunk/io.c#L8402
 	fptr->mode |= FMODE_PREP;
     else
 	fptr->mode &= ~FMODE_PREP;
-    return io;
+    return autoclose;
 }
 
 static void

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