dying in the nether with wither on results in game crash

died in the nether with wither on, can't open world without seeing this crash

Problem signature:
Problem Event Name: BEX64
Application Name: javaw.exe
Application Version: 6.0.310.5
Application Timestamp: 4f2c9b18
Fault Module Name: StackHash_2264
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Offset: 0000000000000000
Exception Code: c0000005
Exception Data: 0000000000000008
OS Version: 6.1.7600.2.0.0.256.48
Locale ID: 1033
Additional Information 1: 2264
Additional Information 2: 2264db07e74365624c50317d7b856ae9
Additional Information 3: 875f
Additional Information 4: 875fa2ef9d2bdca96466e8af55d1ae6e