invalid memory address or nil pointer dereference after cluster change

[zigmund]

I have 5 cluster (contexts) in kubeconfig.

Started octant 0.5.1, changed cluster via top-right menu. Octant crashed in a few seconds.

Got few times in logs:

2019-08-11T23:09:22.829+0600    ERROR   cluster/cluster.go:178  Having trouble retrieving the REST mapping from your cluster at https://***. Retrying.....        {"err": "no matches for kind \"adapter\" in group \"config.istio.io\"", "group-kind": "adapter.config.istio.io"}
github.com/vmware/octant/internal/cluster.(*Cluster).Resource
        /go/src/github.com/vmware/octant/internal/cluster/cluster.go:178
github.com/vmware/octant/internal/objectstore.(*DynamicCache).HasAccess
        /go/src/github.com/vmware/octant/internal/objectstore/dynamic_cache.go:171
github.com/vmware/octant/pkg/navigation.ListCustomResources
        /go/src/github.com/vmware/octant/pkg/navigation/navigation.go:175
github.com/vmware/octant/pkg/navigation.CRDEntries
        /go/src/github.com/vmware/octant/pkg/navigation/navigation.go:85
github.com/vmware/octant/internal/octant.(*NavigationFactory).genNode
        /go/src/github.com/vmware/octant/internal/octant/factory.go:115
github.com/vmware/octant/internal/octant.(*NavigationFactory).Generate.func1
        /go/src/github.com/vmware/octant/internal/octant/factory.go:83
github.com/vmware/octant/vendor/golang.org/x/sync/errgroup.(*Group).Go.func1
        /go/src/github.com/vmware/octant/vendor/golang.org/x/sync/errgroup/errgroup.go:57

And finally:

2019-08-11T23:09:27.829+0600    ERROR   cluster/cluster.go:189  Unable to retrieve the REST mapping from your cluster at https://***. Full error details below.   {"group-kind": "adapter.config.istio.io"}
github.com/vmware/octant/internal/cluster.(*Cluster).Resource
        /go/src/github.com/vmware/octant/internal/cluster/cluster.go:189
github.com/vmware/octant/internal/objectstore.(*DynamicCache).HasAccess
        /go/src/github.com/vmware/octant/internal/objectstore/dynamic_cache.go:171
github.com/vmware/octant/pkg/navigation.ListCustomResources
        /go/src/github.com/vmware/octant/pkg/navigation/navigation.go:175
github.com/vmware/octant/pkg/navigation.CRDEntries
        /go/src/github.com/vmware/octant/pkg/navigation/navigation.go:85
github.com/vmware/octant/internal/octant.(*NavigationFactory).genNode
        /go/src/github.com/vmware/octant/internal/octant/factory.go:115
github.com/vmware/octant/internal/octant.(*NavigationFactory).Generate.func1
        /go/src/github.com/vmware/octant/internal/octant/factory.go:83
github.com/vmware/octant/vendor/golang.org/x/sync/errgroup.(*Group).Go.func1
        /go/src/github.com/vmware/octant/vendor/golang.org/x/sync/errgroup/errgroup.go:57
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0x1214dc8]

Environment:

zigmund@junlge:~> lsb_release -a
LSB Version:    n/a
Distributor ID: openSUSE
Description:    openSUSE Leap 15.0
Release:        15.0
Codename:       n/a
zigmund@junlge:~> uname -r
4.12.14-lp150.12.22-default
zigmund@junlge:~> octant version
Version:  0.5.1
Git commit:  e0397d2596a7575abf4ca9aeacafd92912d484e0
Built:  2019-08-06T19:40:35Z

[bryanl]

This may have been caused because of a CRD bug. A fix is now in master #170