console.c: unpaired size

* ext/io/console/console.c (console_set_winsize): reject unpaired
  pixel size.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57282 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/io/console/console.c

@@ -535,11 +535,15 @@ console_set_winsize(VALUE io, VALUE size)
     VALUE row, col, xpixel, ypixel;
     const VALUE *sz;
     int fd;
-    int sizelen;
+    long sizelen;
 
     GetOpenFile(io, fptr);
     size = rb_Array(size);
-    rb_check_arity(sizelen = RARRAY_LENINT(size), 2, 4);
+    if ((sizelen = RARRAY_LEN(size)) != 2 && sizelen != 4) {
+	rb_raise(rb_eArgError,
+		 "wrong number of arguments (given %ld, expected 2 or 4)",
+		 sizelen);
+    }
     sz = RARRAY_CONST_PTR(size);
     row = sz[0], col = sz[1], xpixel = ypixel = Qnil;
     if (sizelen == 4) xpixel = sz[2], ypixel = sz[3];

test/io/console/test_io_console.rb

@@ -257,6 +257,7 @@ defined?(PTY) and defined?(IO.console) and TestIO_Console.class_eval do
         else
           assert(false, "winsize on #{path} succeed: #{s.inspect}")
         end
+        assert_raise(ArgumentError) {io.winsize = [0, 0, 0]}
       end
     end
   end