Wikimedia Bugzilla is closed!

Detecting recursive calls might be difficult, but it can just suppress all warnings. From /tests/qunit/data/testrunner.js in core, these functions are used several times in tests:

	var warn;

	function suppressWarnings() {
		warn = mw.log.warn;
		mw.log.warn = $.noop;
	}

	function restoreWarnings() {
		if ( warn !== undefined ) {
			mw.log.warn = warn;
			warn = undefined;
		}
	}

The high priority bug was bug 67420 which has been fixed.

Actually, I don't see any way to implement this, given that everything can be asynchronous. I might be missing something, but this seems impossible.

We can implement some half-solutions (only guarantee detection of this scenario when both the track handler and everything it does is synchronous; stop sending further tracks after some limit is reached;), but they would be prone to failure and could instill a false sense of confidence.

There is a (conceptually) very simple way to avoid this: don't use deprecated APIs in your mw.track handler.