.

wcfs/wcfs.go

@@ -1511,7 +1511,7 @@ func (wlink *WatchLink) setupWatch(ctx context.Context, foid zodb.Oid, at zodb.T
 
 	// check at >= w.at
 	// XXX we might want to allow going back in history if we need it.
-	if !(at >= w.at) {
+	if !(at >= w.at) {	// XXX locking
 		return fmt.Errorf("going back in history is forbidden")
 	}
 

wcfs/wcfs_test.py

@@ -60,9 +60,11 @@ def setup_module():
     install_sigbus_trap()
 
     # if wcfs.go is built with race detector and detects a race - make it fail
-    # current test loudly the first wcfs.go race
-    if "GORACE" not in os.environ:
-        os.environ["GORACE"]="halt_on_error=1"
+    # current test loudly on the first wcfs.go race
+    gorace = os.environ.get("GORACE", "")
+    if gorace != "":
+        gorace += " "
+    os.environ["GORACE"] = gorace + "halt_on_error=1"
 
     global testdb, testzurl, testmntpt
     testdb = getTestDB()