diff --git a/ChangeLog b/ChangeLog
index af73ef5005..307bcba411 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Nov 13 17:35:49 2012  Koichi Sasada  <ko1@atdot.net>
+
+	* compile.c (insn_data_to_s_detail): remove debug lines.
+
 Tue Nov 13 17:28:47 2012  Koichi Sasada  <ko1@atdot.net>
 
 	* vm_insnhelper.c (vm_caller_setup_args): save and restore
diff --git a/compile.c b/compile.c
index 2f7fc1d6b4..5e79427893 100644
--- a/compile.c
+++ b/compile.c
@@ -5282,9 +5282,6 @@ insn_data_to_s_detail(INSN *iobj)
 		{
 		    rb_call_info_t *ci = (rb_call_info_t *)OPERAND_AT(iobj, j);
 		    rb_str_catf(str, "<callinfo:%s, %d>", ci->mid ? rb_id2name(ci->mid) : "", ci->orig_argc);
-		    if (ci->orig_argc > 60) {
-			rb_bug("xyzzy");
-		    }
 		    break;
 		}
 	      case TS_CDHASH:	/* case/when condition cache */