Hi Elijah, On Thu, 25 Jul 2019, Elijah Newren wrote: > diff --git a/merge-recursive.c b/merge-recursive.c > index 7f56cb0ed1..1a3c6ab7f3 100644 > --- a/merge-recursive.c > +++ b/merge-recursive.c > [...] > @@ -434,11 +434,10 @@ struct tree *write_tree_from_memory(struct merge_options *opt) > > if (!cache_tree_fully_valid(istate->cache_tree) && > cache_tree_update(istate, 0) < 0) { > - err(opt, _("error building trees")); > - return NULL; > + BUG("error building trees"); Hmm. Is it possible that something else than a bug in Git causes this to fail? I wonder, for example, whether a full disk can cause `cache_tree_update()` to return a negative value. Ciao, Dscho