fixed memory violation. stray nil dirs around tho

cmd/path-traversal/path_traversal.go

 package main
 
 import (
-	"code.fbi.h-da.de/cocsn/yang-models/generated/openconfig"
+	schema "code.fbi.h-da.de/cocsn/yang-models/generated/arista"
 	"fmt"
 	"github.com/openconfig/goyang/pkg/yang"
 )
@@ -12,12 +12,14 @@ type PathElement struct {
 }
 
 func main() {
-	tree := openconfig.SchemaTree
+	tree := schema.SchemaTree
 	paths := make(map[string]*PathElement)
 
 	for k,v := range tree {
-		if v.Parent.Name == "device" {
-			paths[k] = processEntry(v)
+		if v.Parent != nil {
+			if v.Parent.Name == "device" {
+				paths[k] = processEntry(v)
+			}
 		}
 	}
 	fmt.Println("stop")
@@ -33,7 +35,7 @@ func processEntry(e *yang.Entry) *PathElement {
 			child :=  processEntry(v)
 			elem.Children = append(elem.Children, child)
 		}
-
+		return elem
 	}
 	leaf := &PathElement{
 		Name:     e.Name,

go.mod

@@ -4,7 +4,7 @@ go 1.14
 
 require (
 	code.fbi.h-da.de/cocsn/swagger/apis v0.0.0-20200924152423-61030cab7b88
-	code.fbi.h-da.de/cocsn/yang-models v0.0.3
+	code.fbi.h-da.de/cocsn/yang-models v0.0.4
 	code.fbi.h-da.de/cocsn/yang-modules/generated/tapi v0.0.0-20201116134549-765aa1790752
 	github.com/BurntSushi/toml v0.3.1
 	github.com/gdamore/tcell/v2 v2.0.1-0.20201017141208-acf90d56d591
@@ -13,8 +13,8 @@ require (
 	github.com/golang/protobuf v1.4.2
 	github.com/neo4j/neo4j-go-driver v1.8.3
 	github.com/onsi/ginkgo v1.13.0 // indirect
-	github.com/openconfig/goyang v0.2.1
-	github.com/openconfig/ygot v0.8.11
+	github.com/openconfig/goyang v0.2.2
+	github.com/openconfig/ygot v0.10.0
 	github.com/rivo/tview v0.0.0-20201018122409-d551c850a743
 	github.com/sirupsen/logrus v1.4.2
 	github.com/tidwall/gjson v1.6.3

go.sum

 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 code.fbi.h-da.de/cocsn/swagger/apis v0.0.0-20200924152423-61030cab7b88 h1:cNqY3WEh+CX8+esxIwWU/uD7hRC5mPvuJmXzB07OeuA=
 code.fbi.h-da.de/cocsn/swagger/apis v0.0.0-20200924152423-61030cab7b88/go.mod h1:3jDZAOmepPl3kiukNGvPFkJEzgGczgrC3zJ2jcqVFSs=
-code.fbi.h-da.de/cocsn/yang-models v0.0.3 h1:VTVHDTyJiC2TeTAZyxJ1ZFqRwo6H7UeY7PXfp9GXYEY=
-code.fbi.h-da.de/cocsn/yang-models v0.0.3/go.mod h1:X40pn/xQ1lTNbFFN9QFK99oSNaeN/Rg3MSpdhWc3IS8=
+code.fbi.h-da.de/cocsn/yang-models v0.0.4 h1:y/Ph5CaD2NJDPjoOuS59iKrMYf9bvpg2/hefC2RG6E4=
+code.fbi.h-da.de/cocsn/yang-models v0.0.4/go.mod h1:7MnNmAQ9o84BpUepcaV6RB1mBGCNyXVJcdbKUl6rK0g=
 code.fbi.h-da.de/cocsn/yang-modules/generated/tapi v0.0.0-20201116134549-765aa1790752 h1:hCeie9cCBt0gyETD0EAINuWqpEokf0ulP1Rv9F+rXB0=
 code.fbi.h-da.de/cocsn/yang-modules/generated/tapi v0.0.0-20201116134549-765aa1790752/go.mod h1:EhCu5gVeMKHpjwoV5g5eycc7WcfU98jkPswLDRHQX5w=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
@@ -225,13 +225,13 @@ github.com/openconfig/goyang v0.0.0-20200115183954-d0a48929f0ea/go.mod h1:dhXaV0
 github.com/openconfig/goyang v0.0.0-20200616001533-c0659aea65dd/go.mod h1:vX61x01Q46AzbZUzG617vWqh/cB+aisc+RrNkXRd3W8=
 github.com/openconfig/goyang v0.0.0-20200917201611-633eccb6fa97 h1:TaCuNSX/fiTuky8ouzC+JaCJN+OSOpjtYlLrn/uXxxE=
 github.com/openconfig/goyang v0.0.0-20200917201611-633eccb6fa97/go.mod h1:vX61x01Q46AzbZUzG617vWqh/cB+aisc+RrNkXRd3W8=
-github.com/openconfig/goyang v0.2.1 h1:TaADsLGzULGQL8xTmvLjmXqZ/J1F73dMzURDqrv9cLs=
-github.com/openconfig/goyang v0.2.1/go.mod h1:vX61x01Q46AzbZUzG617vWqh/cB+aisc+RrNkXRd3W8=
+github.com/openconfig/goyang v0.2.2 h1:J8hlJk1GSHrcr9vVI7dTvsThsKihWcNXRjWOkjRK0Cw=
+github.com/openconfig/goyang v0.2.2/go.mod h1:vX61x01Q46AzbZUzG617vWqh/cB+aisc+RrNkXRd3W8=
 github.com/openconfig/ygot v0.6.0/go.mod h1:o30svNf7O0xK+R35tlx95odkDmZWS9JyWWQSmIhqwAs=
 github.com/openconfig/ygot v0.8.7 h1:BKErV6vM15YGM1+XHDuLAQ938dYahzSgwlt9BIGFrdY=
 github.com/openconfig/ygot v0.8.7/go.mod h1:AqXe0HNEITTcmcYkr+yzDMY8ofitImUdfZV4IgRsJWU=
-github.com/openconfig/ygot v0.8.11 h1:s9BtpSeqChokRQHhTatv2xmwkTLHPz0ghPnVpgmz8WU=
-github.com/openconfig/ygot v0.8.11/go.mod h1:Qh/F0ycMLXJlZn4cR+5iuefEMthLggO8KBq8wjXYPTY=
+github.com/openconfig/ygot v0.10.0 h1:EmgwLXbFiCBmEUlSI4/1fPuRzgf4EsD0sThmAmRqbYM=
+github.com/openconfig/ygot v0.10.0/go.mod h1:oCQNdXnv7dWc8scTDgoFkauv1wwplJn5HspHcjlxSAQ=
 github.com/pborman/getopt v0.0.0-20190409184431-ee0cd42419d3/go.mod h1:85jBQOZwpVEaDAr341tbn15RS4fCAsIst0qp7i8ex1o=
 github.com/pborman/uuid v1.2.0/go.mod h1:X/NO0urCmaxf9VXbdlT7C2Yzkj2IKimNn4k+gtPdI/k=
 github.com/pelletier/go-toml v1.4.0/go.mod h1:PN7xzY2wHTK0K9p34ErDQMlFxa51Fk0OUruD3k1mMwo=