Can't set timers inside simulations

I'm getting an error which originates from the `_saveDatabase`-function, specifically the
line `self._saveDatabaseTimeout(function() {`:

From the console log:

Error: Can't set timers inside simulations
at withoutInvocation (http://localhost/packages/meteor.js?:433:13)
at bindAndCatch (http://localhost/packages/meteor.js?:441:33)
at Object._.extend.setTimeout (http://localhost/packages/meteor.js?:457:23)
at oneTimeout [ as _saveDatabaseTimeout ] ( http://localhost/packages/raix_onetimeout.js?:47:17 )
**at _saveDatabase (http://localhost/packages/ground_db.js?:548:10)**
at http://localhost/packages/ground_db.js?:193:19
at http://localhost/packages/raix_eventemitter.js?:122:16
at Array.forEach (native)
at Function._.each._.forEach (http://localhost/packages/underscore.js?:156:11)
at _runCallbacks (http://localhost/packages/raix_eventemitter.js?:118:7)

The error occurs when running a method stub on client that contains Tracker.flush().

Meteor.methods({
foo: function (doc) {
collection.insert(doc);
Tracker.flush();
// ...more code...
}});

Start with packages/ground_db.js at _saveDatabase, especially the line calling _saveDatabaseTimeout, and reproduce the issue using a Meteor method stub that inserts a document and calls Tracker.flush(). Read the related raix_onetimeout stack entry to understand the timer path. Done means the reproduction no longer raises the simulation timer error while the database save still occurs correctly.

Written by the indexing model from the issue text.