Crashing when calling `tend`

[slundqui]

Fuzzing intermittently crashes on tend with the following error:

0x08c379a00000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000001a73747261746567792074656e64206661696c65643a20bb55fd27000000000000

Will track down with stack trace.

[slundqui]

Looks like it's crashing with the following stack trace:

tend
...
_tend
_openLong
????

This one is hard to reproduce, will keep running and attempt to get where in EverlongStrategy:_openLong it crashes.