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+Fri Jul  1 04:32:52 2016  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* .gdbinit (rb_ps_thread): show ruby level backtrace.
+	  Usually you can call `rb_ps` to show ruby leve backtraces
+	  for all living threads.
+	  Note that it can call with core file like `gcore <pid>`
+	  and `gdb ruby core.<pid>`.
+
 Thu Jun 30 19:15:13 2016  Naohisa Goto  <ngotogenome@gmail.com>
 
 	* string.c: Fix memory corruptions when using UTF-16/32 strings.