stg_PAP_info crash

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x3c400050
0x3c400050 in ?? ()
(gdb) where
#0  0x3c400050 in ?? ()
Cannot access memory at address 0x3c400050
Cannot access memory at address 0x3c400050
Cannot access memory at address 0x3c400050
#1  0x00298b9c in stg_PAP_info ()
Cannot access memory at address 0x3c400050
#2  0x002d92cc in schedule ()
#3  0x002d9e94 in waitThread_ ()
#4  0x002d9dac in scheduleWaitThread ()
#5  0x002d0c50 in rts_evalLazyIO ()
#6  0x000521b8 in main ()

(gdb) p16 $r22
0x16977b0:      0x296b94 <stg_unblockAsyncExceptionszh_ret_info>
0x16977ac:      0x1697cb4
0x16977a8:      0x16c0b60
0x16977a4:      0x3039e4 <s3BS_info>
0x16977a0:      0x1697ca4
0x169779c:      0x1
0x1697798:      0x0
0x1697794:      0x16c0b60
0x1697790:      0x296f84 <stg_catch_frame_info>
0x169778c:      0x296bd0 <stg_blockAsyncExceptionszh_ret_info>
0x1697788:      0x16c0e30
0x1697784:      0x1697c8c
0x1697780:      0x1697c78
0x169777c:      0x16c0e30
0x1697778:      0x1de80 <seLg_info>
0x1697774:      0x16569d8
0x1697770:      0x2f9918 <s2RG_info>


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