* proc.c (proc_arity): fix an arity bug ([ruby-core:11060]).

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12232 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Tue May  1 13:59:18 2007  Koichi Sasada  <ko1@atdot.net>
+
+	* proc.c (proc_arity): fix an arity bug ([ruby-core:11060]).
+
 Tue May  1 13:12:49 2007  Koichi Sasada  <ko1@atdot.net>
 
 	* yarvcore.h, compile.c (set_arguments): support post arguments.

proc.c

@@ -443,7 +443,8 @@ proc_arity(VALUE self)
     rb_iseq_t *iseq;
     GetProcPtr(self, proc);
     iseq = proc->block.iseq;
-    if (iseq && BUILTIN_TYPE(iseq) != T_NODE) {
+    if (iseq) {
+	if (BUILTIN_TYPE(iseq) != T_NODE) {
 	    if (iseq->arg_rest < 0) {
 		return INT2FIX(iseq->argc);
 	    }
@@ -452,9 +453,15 @@ proc_arity(VALUE self)
 	    }
 	}
 	else {
-	return INT2FIX(-1);
+	    NODE *node = (NODE *)iseq;
+	    if (nd_type(node) == NODE_IFUNC && node->nd_cfnc == bmcall) {
+		/* method(:foo).to_proc.arity */
+		return INT2FIX(method_arity(node->nd_tval));
 	    }
 	}
+    }
+    return INT2FIX(-1);
+}
 
 int
 rb_proc_arity(VALUE proc)