Started a new game(no mods, Ham only, playing as Wilson, a few minor changes in world gen), tried to enter a cave cleft almost immediately, game crashed. Tried to do this again, by continuing (wich was technically a restart, as a save was at the beginning of the day). Unsurprisingly, game crashed again.
First time I got some grass and twigs before going in, second time went in with the machete alone.
Nothing special, just tried to enter a cave cleft a few minutes/seconds after spawning.