On Wed, Feb 06, 2019 at 10:25:25AM +0000, Luke Diamand wrote: > I've recently started seeing a lot of this message when doing a rebase: > > warning: could not freshen shared index > '/home/ldiamand/git/dev_full/.git/worktrees/gcc8-take-2/sharedindex.0000000000000000000000000000000000000000' There are only two places in the code that could print this. The one in read_index_from() can't happen unless is_null_oid() is broken (very very unlikely). The other one is in write_locked_index() which could happen in theory but I don't understand how it got there. If you could build git, could you try this patch and see if it helps? -- 8< -- diff --git a/read-cache.c b/read-cache.c index f68b367613..5ad71478dc 100644 --- a/read-cache.c +++ b/read-cache.c @@ -3165,6 +3165,7 @@ int write_locked_index(struct index_state *istate, struct lock_file *lock, fill_fsmonitor_bitmap(istate); if (!si || alternate_index_output || + (si && is_null_oid(&si->base_oid)) || (istate->cache_changed & ~EXTMASK)) { if (si) oidclr(&si->base_oid); -- 8< -- > (There's a repo called dev_full, and I've got a worktree where I'm > working on my 3rd attempt to make it work with gcc8). > > That file doesn't actually exist but there are a bunch of > sharedindex.XXX files in there with more convincing looking names. > > 2.20.1.611.gfbb209baf1 -- Duy