nobu	2015-12-08 23:47:38 +0900 (Tue, 08 Dec 2015)

  New Revision: 52958

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=52958

  Log:
    compile.c: make opt a string value
    
    * compile.c (iseq_ibf_dump): rb_check_string_type() returns nil if
      the object does not have to_str method.

  Modified files:
    trunk/compile.c
Index: compile.c
===================================================================
--- compile.c	(revision 52957)
+++ compile.c	(revision 52958)
@@ -8064,9 +8064,10 @@ iseq_ibf_dump(const rb_iseq_t *iseq, VAL https://github.com/ruby/ruby/blob/trunk/compile.c#L8064
     header.size = ibf_dump_pos(&dump);
 
     if (RTEST(opt)) {
-	VALUE opt_str = rb_check_string_type(opt);
+	VALUE opt_str = opt;
+	const char *ptr = StringValuePtr(opt_str);
 	header.extra_size = RSTRING_LENINT(opt_str) + 1;
-	ibf_dump_write(&dump, RSTRING_PTR(opt_str), header.extra_size);
+	ibf_dump_write(&dump, ptr, header.extra_size);
     }
     else {
 	header.extra_size = 0;

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