normal	2018-11-28 07:20:45 +0900 (Wed, 28 Nov 2018)

  New Revision: 66049

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=66049

  Log:
    io.c (struct copy_stream_struct): packing
    
    Reduce the struct to 80 bytes (from 88) on amd64 to reduce
    stack use.

  Modified files:
    trunk/io.c
Index: io.c
===================================================================
--- io.c	(revision 66048)
+++ io.c	(revision 66049)
@@ -10697,11 +10697,11 @@ struct copy_stream_struct { https://github.com/ruby/ruby/blob/trunk/io.c#L10697
 
     int src_fd;
     int dst_fd;
-    int close_src;
-    int close_dst;
+    unsigned close_src : 1;
+    unsigned close_dst : 1;
+    int error_no;
     off_t total;
     const char *syserr;
-    int error_no;
     const char *notimp;
     VALUE th;
 };

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