Litefs crash

[tjheeta]

Was restarting litefs and it was connecting back to the primary and it happened. Can't seem to reproduce this, but this is the stacktrace off of the build of 37d2e5d.

root@9d625ce1:/mnt/litefs# fgstream connected
stream disconnected
http: panic serving [fdaa:0:2fff:a7b:2c00:163d:ee67:2]:51588: runtime error: invalid memory address or nil pointer dereference
goroutine 132 [running]:
net/http.(*conn).serve.func1()
        /gnu/store/d06665qgp3zqp05fr0q1sdbfnpvxywsc-go-1.17.11/lib/go/src/net/http/server.go:1802 +0xb9
panic({0x949b80, 0xe43c90})
        /gnu/store/d06665qgp3zqp05fr0q1sdbfnpvxywsc-go-1.17.11/lib/go/src/runtime/panic.go:1047 +0x266
github.com/superfly/litefs.(*DB).Pos(0xc00027ee28)
        /current/litefs/db.go:116 +0x39
github.com/superfly/litefs/http.(*Server).streamDB(0xc000170aa0, {0xaa7f10, 0xc0001f8f00}, {0xaa5090, 0xc0004027e0}, 0x6a6f85, 0x1000000009bf760)
        /current/litefs/http/server.go:215 +0x31e
github.com/superfly/litefs/http.(*Server).handlePostStream(0xc000170aa0, {0xaa5090, 0xc0004027e0}, 0xc000284c00)
        /current/litefs/http/server.go:181 +0x549
github.com/superfly/litefs/http.(*Server).serveHTTP(0xc000170aa0, {0xaa5090, 0xc0004027e0}, 0xc000284c00)
        /current/litefs/http/server.go:138 +0x251
net/http.HandlerFunc.ServeHTTP(0x0, {0xaa5090, 0xc0004027e0}, 0x10)
        /gnu/store/d06665qgp3zqp05fr0q1sdbfnpvxywsc-go-1.17.11/lib/go/src/net/http/server.go:2047 +0x2f
net/http.serverHandler.ServeHTTP({0xaa37d8}, {0xaa5090, 0xc0004027e0}, 0xc000284c00)
        /gnu/store/d06665qgp3zqp05fr0q1sdbfnpvxywsc-go-1.17.11/lib/go/src/net/http/server.go:2879 +0x43b
net/http.(*conn).serve(0xc000416780, {0xaa7fb8, 0xc000273cb0})
        /gnu/store/d06665qgp3zqp05fr0q1sdbfnpvxywsc-go-1.17.11/lib/go/src/net/http/server.go:1930 +0xb08
created by net/http.(*Server).Serve
        /gnu/store/d06665qgp3zqp05fr0q1sdbfnpvxywsc-go-1.17.11/lib/go/src/net/http/server.go:3034 +0x4e8