This is why ECC RAM is a good thing
[2954432.978093] [Hardware Error]: Corrected error, no action required. [2954432.982285] [Hardware Error]: CPU:6 (10:8:0) MC4_STATUS[-|CE|MiscV|-|AddrV|CECC]: 0x9c5cc820001c017b [2954432.986453] [Hardware Error]: MC4 Error Address: 0x000000054a089400 [2954432.990528] [Hardware Error]: MC4 Error (node 1): L3 data cache ECC error. [2954432.994525] [Hardware Error]: cache level: L3/GEN, tx: GEN, mem-tx: EV [2954432.998450] mce: [Hardware Error]: Machine check events logged
Who knows what was going at the time...
Syndicated 2016-02-24 02:08:18 from I Dream of Rain (free_software)