Built a sketch of a 90GB fasta file using k=21. Running 'mash info' on the resulting '.msh' file returns an error:

ls -l imgdb.fa
-rw-r--r-- 1 copeland copeland 90G Fri Oct 23 11:45:23 2015 imgdb.fa

mash sketch -i -k 21 imgdb.fa

mash info imgdb.fa.msh
terminate called after throwing an instance of 'kj::ExceptionImpl'
what(): capnp/layout.c++:1966: failed: expected ref->kind() == WirePointer::LIST; Message contains non-list pointer where list pointer was expected.
stack: 0x41e071 0x40e3b1 0x425d02 0x4181a9 0x4046bd 0x7f63c6546c8d 0x404445
Aborted

Works fine with k=16, however.