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+Thu Jan 24 11:14:56 2008  Tanaka Akira  <akr@fsij.org>
+
+	* string.c (rb_enc_cr_str_buf_cat): ASCII incompatible encoding is
+	  not compatible with any other encoding.
+
 Thu Jan 24 07:34:34 2008  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* parse.y (STR_NEW0): set encoding as US-ASCII.