* compile.c (iseq_specialized_instruction): check argc.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13905 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Tue Nov 13 15:21:52 2007  Koichi Sasada  <ko1@atdot.net>
+
+	* compile.c (iseq_specialized_instruction): check argc.
+
 Tue Nov 13 14:44:32 2007  why the lucky stiff  <why@ruby-lang.org>
 
 	* test/yaml/test_yaml.rb: fixed the failing YAML Struct test

compile.c

@@ -1482,13 +1482,15 @@ iseq_specialized_instruction(rb_iseq_t *iseq, INSN *iobj)
 	    }
 	}
 
-	if (mid == idSend || mid == id__send ||
-	    mid == idSendBang ||
-	    mid == id__send__ ) {
-	    OPERAND_AT(iobj, 3) |= INT2FIX(VM_CALL_SEND_BIT);
-	}
-	if (mid == idSendBang) {
-	    OPERAND_AT(iobj, 3) |= INT2FIX(VM_CALL_SEND_BANG_BIT);
+	if (argc > 0) {
+	    if (mid == idSend || mid == id__send ||
+		mid == idSendBang ||
+		mid == id__send__ ) {
+		OPERAND_AT(iobj, 3) |= INT2FIX(VM_CALL_SEND_BIT);
+	    }
+	    if (mid == idSendBang) {
+		OPERAND_AT(iobj, 3) |= INT2FIX(VM_CALL_SEND_BANG_BIT);
+	    }
 	}
     }
     return COMPILE_OK;