Make sure error works in vcl_fetch

error was unimplemented in vcl_fetch.  Implement it and add a test
case.


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3263 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_center.c

@@ -426,6 +426,14 @@ cnt_fetch(struct sess *sp)
 		break;
 	case VCL_RET_DELIVER:
 		break;
+	case VCL_RET_ERROR:
+		sp->step = STP_ERROR;
+		sp->obj->ttl = 0;
+		sp->obj->cacheable = 0;
+		HSH_Unbusy(sp);
+		HSH_Deref(sp->obj);
+		sp->obj = NULL;
+		return (0);
 	default:
 		WRONG("Illegal action in vcl_fetch{}");
 	}

bin/varnishtest/tests/b00018.vtc

+# $Id$
+
+test "Check that error in vcl_fetch works"
+
+server s1 {
+	rxreq 
+	txresp -body "012345\n"
+} -start
+
+varnish v1 -vcl+backend { 
+	sub vcl_fetch {
+	    set obj.http.Foo = "bar";
+	    error 523 "not ok";
+	}
+} -start
+
+client c1 {
+	txreq -url "/"
+	rxresp
+	expect resp.status == 523
+} -run