src: guard against starting fs watcher twice

bnoordhuis · bnoordhuis · commit 57387fa29f13 · 2016-06-29T12:20:59.000+02:00
This commit adds a CHECK that verifies that the file event watcher is not started twice, which would be indicative of a bug in lib/fs.js. PR-URL: nodejs#7374 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
diff --git a/src/fs_event_wrap.cc b/src/fs_event_wrap.cc
@@ -88,6 +88,7 @@ void FSEventWrap::Start(const FunctionCallbackInfo<Value>& args) {
 
   FSEventWrap* wrap;
   ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
+  CHECK_EQ(wrap->initialized_, false);
 
   static const char kErrMsg[] = "filename must be a string or Buffer";
   if (args.Length() < 1)
