Nobody can tell you anything without proper system info or other technical details liek exact version of AE and what exactly you are doing. Since it's related to fonts, start by weeding out unnecessary ones.
I'm working with after effect CC 2015 (V126.96.36.199) on windows 7 64bit
I think it's realeted with the font, but the numbers <5000> changing every time when AE crash... and the problem is not related to one font... it's always happen when I try to select a font, and AE crash every time but not on one particular font ...
Try resetting your preferences.