shithub: gefs

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snap: when taking mutable snaps, the base is the forked snap, not its predecessor

--- a/snap.c

+++ b/snap.c

@@ -359,8 +359,8 @@

 		n->nref = 0;

 		n->ht = t->ht;

 		n->bp = t->bp;

-		n->pred = t->pred;

 		n->succ = -1;

+		n->pred = t->gen;

 		n->base = t->gen;

 		n->gen = aincv(&fs->nextgen, 1);

 		n->memgen = aincv(&fs->nextgen, 1);