avoid recursive watchers in the root of the filesystem

Author: sokra

lib/reducePlan.js

@@ -74,7 +74,7 @@ module.exports = (plan, limit) => {
 		let bestNode = undefined;
 		let bestCost = Infinity;
 		for (const node of treeMap.values()) {
-			if (node.entries <= 1 || !node.children) continue;
+			if (node.entries <= 1 || !node.children || !node.parent) continue;
 			if (node.children.length === 0) continue;
 			if (node.children.length === 1 && !node.value) continue;
 			// Try to select the node with has just a bit more entries than we need to reduce