Crash with Iris+, log + video

Hey,

I had a problem with my iris + yesterday, which have become suddenly uncontrollable. This is the first time this has happened, and I do not know how to interpret my log, could someone tell me why my iris + behaved like that?

Log auto analysis :
Test: Autotune = UNKNOWN - No ATUN log data
Test: Balance/Twist = GOOD -
Test: Brownout = GOOD -
Test: Compass = GOOD - mag_field interference within limits (17.39%)

Test: Dupe Log Data = GOOD -
Test: Empty = GOOD -
Test: Event/Failsafe = FAIL - ERR found: CRASH
Test: GPS = GOOD -
Test: IMU Mismatch = GOOD - (Mismatch: 0.65, WARN: 0.75, FAIL: 1.50)
Test: Parameters = GOOD -
Test: PM = FAIL - 24 slow loop lines found, max 10.68% on line 16740
Test: Pitch/Roll = FAIL - Roll (125.45, line 57211) > maximum lean angle (30.00)
Test: Thrust = GOOD -
Test: VCC = GOOD -

Thanks in advance

Video : vimeo.com/126041354
(password : crash)