Stability Problem Solve but not understood

[Julien freeradius]

Hello,

As I have explain on previous post , our freeradius was crashing while 
reciving an accounting request from a specific user.  At the end by 
disabling the detail and auth detail log, the user stop crashing the server.
But I can't understand why.
Which kind of request could crash Freeradius through the detail module ?
I have try to send exactly the same attribute than him but the 
freeradius don't crash
Which log I should check to understand and be able to reactivate the 
detail log ?

Thanks in advance

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