ConsulCatalog and File not working

[gozer]

I've been trying what seems to me like a straightforward configuration. ConsulCatalog for most services along with a few manual rules in a file.

My config looks like:

/etc/traefik/traefik.toml

defaultEntryPoints = ["http","https"]

[entryPoints]
  [entryPoints.http]
    address = ":80"
    [entryPoints.http.redirect]
      entryPoint = "https"
  [entryPoints.https]
    address = ":443"
    [entryPoints.https.tls]

[file]
watch = true
filename = "/etc/traefik/rules.toml"

[consulCatalog]
endpoint = "127.0.0.1:8500"

[consul]
endpoint = "127.0.0.1:8500"
watch = true
prefix = "traefik/prod/config"

[acme]
email="gozer@mozilla.com"
storage = "traefik/prod/acme"
entryPoint = "https"

/etc/traefik/rules.toml

[backends]
  [backends.backend-nginx]
    [backends.backend-nginx.servers.local]
    url = "http://127.0.0.1:8080"

[frontends]
  [frontends.frontend-nginx]
  backend = "backend-nginx"
  entrypoints = ["https","http"]
    [frontends.frontend-nginx.routes.main]
    rule = "Host:nginx.localdomain"

And here is what's interesting about that. If I start traefik with that configuration, it will start, but a panic will be logged:

ERROR [2016-11-25T14:19:06Z] Error in Go routine: interface conversion: interface is nil, not bool 
goroutine 30 [running]:
runtime/debug.Stack(0x4e668f, 0xc4200166e0, 0xe75a83)
        /usr/local/go/src/runtime/debug/stack.go:24 +0x79
runtime/debug.PrintStack()
        /usr/local/go/src/runtime/debug/stack.go:16 +0x22
github.com/containous/traefik/safe.defaultRecoverGoroutine(0xd2f3a0, 0xc420403d80)
        /go/src/github.com/containous/traefik/safe/routine.go:135 +0x7d
github.com/containous/traefik/safe.GoWithRecover.func1.1(0xedc938)
        /go/src/github.com/containous/traefik/safe/routine.go:126 +0x57
panic(0xd2f3a0, 0xc420403d80)
        /usr/local/go/src/runtime/panic.go:458 +0x243
github.com/containous/traefik/cluster.(*Leadership).IsLeader(0xc420407500, 0x0)
        /go/src/github.com/containous/traefik/cluster/leadership.go:101 +0x64
main.(*Server).postLoadConfig(0xc4200ba900)
        /go/src/github.com/containous/traefik/server.go:293 +0x354
main.(*Server).listenConfigurations(0xc4200ba900, 0xc42023c380)
        /go/src/github.com/containous/traefik/server.go:281 +0x67f
main.(*Server).Start.func2(0xc42023c380)
        /go/src/github.com/containous/traefik/server.go:102 +0x34
github.com/containous/traefik/safe.(*Pool).Go.func1()
        /go/src/github.com/containous/traefik/safe/routine.go:73 +0x3a
github.com/containous/traefik/safe.GoWithRecover.func1(0xedc938, 0xc4204490e0)
        /go/src/github.com/containous/traefik/safe/routine.go:129 +0x4d
created by github.com/containous/traefik/safe.GoWithRecover
        /go/src/github.com/containous/traefik/safe/routine.go:130 +0x49

But traefik will come up, but will never see the configuration from ConsulCatalog

However, if I startup traefik with an empty rules file, then, after startup, if I modify that file to add back the rules as I've showed them, it works as I'd expect, both ConsulCatalog and File configurations are being correctly merged.

[emilevauge]

Fixed by #956