fs: Fix StatWatcher to handle error codes passed in status

lib/fs.js

@@ -1225,7 +1225,7 @@ function StatWatcher() {
 
   this._handle.onchange = function(current, previous, newStatus) {
     if (oldStatus === -1 &&
-        newStatus === -1 &&
+        newStatus < 0 &&
         current.nlink === previous.nlink) return;
 
     oldStatus = newStatus;

test/simple/test-fs-watchFile.js

@@ -0,0 +1,15 @@
+var assert = require('assert');
+var fs = require('fs');
+
+function callbackFail(){
+    assert(false, "Callback should not be called for non-existant files")
+}
+
+//regression test for #25345
+var filename = 'doesNotExist.txt';
+assert(!fs.existsSync(filename), "dummy file exists");
+fs.watchFile(filename, callbackFail);
+
+setTimeout(function() {
+  process.exit()
+}, 5000);