Mac Mini 2011 crash

I there.
Does anyone knows what does it mean?!
Thank's

This is the error message:

Wed Sep 2 00:36:59 2015

*** Panic Report ***

panic(cpu 1 caller 0xffffff802c016df2): Kernel trap at 0xffffff802c3601e3, type 13=general protection, registers:

CR0: 0x0000000080010033, CR2: 0x00007f9888720008, CR3: 0x0000000237d2e053, CR4: 0x00000000000626e0

RAX: 0x50443180414153a8, RBX: 0x0000000000000000, RCX: 0xffffff80405a6000, RDX: 0x0000000000000000

RSP: 0xffffff8137d8b4f0, RBP: 0xffffff8137d8b5c0, RSI: 0x0000000000000000, RDI: 0xffffff80420b5e20

R8: 0x00000000fffffffe, R9: 0xffffff803f45d808, R10: 0xffffff802c147950, R11: 0x00000000000000c0

R12: 0x0000000000000000, R13: 0xffffff80420b5e20, R14: 0x0000000000000000, R15: 0xffffff8137d8b858

RFL: 0x0000000000010246, RIP: 0xffffff802c3601e3, CS: 0x0000000000000008, SS: 0x0000000000000010

Fault CR2: 0x00007f9888720008, Error code: 0x0000000000000000, Fault CPU: 0x1

Backtrace (CPU 1), Frame : Return Address

0xffffff812e7fde10 : 0xffffff802bf2ad21

0xffffff812e7fde90 : 0xffffff802c016df2

0xffffff812e7fe050 : 0xffffff802c033ca3

0xffffff812e7fe070 : 0xffffff802c3601e3

0xffffff8137d8b5c0 : 0xffffff802c16ccdb

0xffffff8137d8b640 : 0xffffff802c122cd2

0xffffff8137d8bd00 : 0xffffff802c1250a1

0xffffff8137d8bf00 : 0xffffff802c11e257

0xffffff8137d8bf50 : 0xffffff802c44b376

0xffffff8137d8bfb0 : 0xffffff802c0344a6

BSD process name corresponding to current thread: fontworker

Mac OS version:

14F27

Kernel version:

Darwin Kernel Version 14.5.0: Wed Jul 29 02:26:53 PDT 2015; root:xnu-2782.40.9~1/RELEASE_X86_64

Kernel UUID: 58F06365-45C7-3CA7-B80D-173AFD1A03C4

Kernel slide: 0x000000002bc00000

Kernel text base: 0xffffff802be00000

__HIB text base: 0xffffff802bd00000

System model name: Macmini5,2 (Mac-4BC72D62AD45599E)

System uptime in nanoseconds: 46513752156

last loaded kext at 6638289373: com.apple.driver.AudioAUUC 1.70 (addr 0xffffff7fade2e000, size 32768)

loaded kexts:

com.apple.driver.AudioAUUC 1.70

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.filesystems.autofs 3.0

com.apple.driver.ApplePlatformEnabler 2.2.0d4

com.apple.driver.AppleTyMCEDriver 1.0.2d2

com.apple.driver.AGPM 110.19.6

com.apple.iokit.IOBluetoothSerialManager 4.3.6f3

com.apple.driver.AppleOSXWatchdog 1

com.apple.driver.AppleMikeyHIDDriver 124

com.apple.driver.AppleMikeyDriver 272.18.1

com.apple.driver.AppleUpstreamUserClient 3.6.1

com.apple.driver.AppleMCCSControl 1.2.12

com.apple.kext.AMDFramebuffer 1.3.2

com.apple.driver.ApplePolicyControl 3.10.25

com.apple.driver.AppleHDAHardwareConfigDriver 272.18.1

com.apple.AMDRadeonX3000 1.3.2

com.apple.driver.AppleThunderboltIP 2.0.2

com.apple.driver.AppleHDA 272.18.1

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.driver.AppleIntelHD3000Graphics 10.0.0

com.apple.driver.AppleFIVRDriver 4.1.0

com.apple.driver.AppleMuxControl 3.10.25

com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

com.apple.kext.AMD6000Controller 1.3.2

com.apple.iokit.IOBluetoothUSBDFU 4.3.6f3

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.3.6f3

com.apple.iokit.IOUserEthernet 1.0.1

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AppleHWAccess 1

com.apple.driver.AppleHV 1

com.apple.driver.AppleIntelSlowAdaptiveClocking 4.0.0

com.apple.driver.AppleLPC 1.7.3

com.apple.driver.AppleIntelSNBGraphicsFB 10.0.0

com.apple.driver.AppleIRController 327.5

com.apple.driver.AppleFileSystemDriver 3.0.1

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1

Model: Macmini5,2, BootROM MM51.0077.B12, 2 processors, Intel Core i5, 2.5 GHz, 4 GB, SMC 1.75f0

Graphics: AMD Radeon HD 6630M, AMD Radeon HD 6630M, PCIe, 256 MB

Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80CE, 0x4D34373142353137335148302D594B302020

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xE4), Broadcom BCM43xx 1.0 (5.106.98.100.24)

Bluetooth: Version 4.3.6f3 16238, 3 services, 18 devices, 1 incoming serial ports

Network Service: Ethernet, Ethernet, en0

Serial ATA Device: Samsung SSD 850 EVO 250GB, 250,06 GB

USB Device: Hub

USB Device: Trust Webcam

USB Device: BRCM20702 Hub

USB Device: Bluetooth USB Host Controller

USB Device: Hub

USB Device: Hub

USB Device: 2.4G Wireless Mouse

USB Device: Keyboard Hub

USB Device: Apple Keyboard

USB Device: IR Receiver

Thunderbolt Bus: Mac mini, Apple Inc., 22.2