Chainfire Warns About Adding and Modifying Files in /System for Android 6.0+

A few folks around the forums have noticed that they are having trouble adding or modifying files within the system partition in Android 6.0/6.0.1 Marshmallow. While Titanium Backup reports that /system has 15.6MB free, Chainfire suspects these few MBs are actually reserved. He continues and says "this issue is a magnet for file corruption and bootloops" and to be careful when modifying anything on /system.

source: xdadevelopers