* vm.c (vm_backtrace): defaults to script name for C functions.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20742 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Mon Dec 15 11:35:27 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* vm.c (vm_backtrace): defaults to script name for C functions.
+
 Mon Dec 15 11:32:18 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ruby.c (rubylib_mangled_path, rubylib_mangled_path2): cannot use

vm.c

@@ -704,7 +704,7 @@ vm_backtrace(rb_thread_t *th, int lev)
     }
 
     ary = vm_backtrace_each(th, RUBY_VM_NEXT_CONTROL_FRAME(cfp),
-			    top_of_cfp, "", 0, ary);
+			    top_of_cfp, RSTRING_PTR(th->vm->progname), 0, ary);
     return ary;
 }