after I saved env in uboot, reboot board .....then after loader env appear:
"Synchronous Abort" handler, esr 0x96000210
elr: 000000008205c8d0 lr : 000000008201bc90 (reloc)
elr: 00000000fbd7a8d0 lr : 00000000fbd39c90
x0 : 0000000000000000 x1 : 0000000040500004
x2 : 0000000000000001 x3 : 0000000000000301
x4 : 00000000000000ff x5 : 0000000000000001
x6 : 0000000000000008 x7 : 00000000fbdc4698
x8 : 00000000fbc16ec0 x9 : 0000000000000008
x10: 000000000000000d x11: 0000000000000006
x12: 000000000001869f x13: 0000000000001238
x14: 00000000fbc16f4c x15: 00000000ffffffff
x16: 0000000001530134 x17: 000000000153000c
x18: 00000000fbc19d70 x19: 00000000fbc20f68
x20: 00000000fbc257a0 x21: 0000000000000000
x22: 00000000fbdaf861 x23: 00000000fbc19e58
x24: 0000000000000020 x25: 0000000000001fff
x26: 0000000000000000 x27: 00000000fbc1e5f5
x28: 000000000000003c x29: 00000000fbc16e20
Resetting CPU ...
resetting ...
I rooted the code and that it died at hashtable.c hsearch_r()。