Hi. Possible brainflayer not work correctly at the end of seed.

The first valid private key in hexadecimal is 0000000000000000000000000000000000000000000000000000000000000001 and the last valid private key in hexadecimal is fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140

brainflayer -v -I fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140 -b example.blf
secp256k1/src/field_impl.h:238: test condition failed: secp256k1_fe_normalizes_to_zero_var(&c)
Aborted

I also try fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd036413b, and result the same.