`oc explain` command failed with error:

oc explain mock-resources 
GROUP:      test.tectonic.com
KIND:       MockResource
VERSION:    v1error: template: plaintext:39:13: executing "plaintext" at <include "schema" (dict "gvk" $gvk "Document" $.Document "FieldPath" $.FieldPath "Recursive" $.Recursive)>: error calling include: template: plaintext:63:21: executing "schema" at <include "output" (set $ "schema" .)>: error calling include: template: plaintext:101:17: executing "output" at <include "fieldList" (dict "schema" $resolved "level" 1 "Document" $.Document "Recursive" $.Recursive)>: error calling include: template: plaintext:254:15: executing "typeGuess" at <.items>: can't evaluate field items in type bool

4.14.x/4.15.x/4.16

always

1. create the CRD by : 
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  name: mock-resources.test.tectonic.com
spec:
  group: test.tectonic.com
  scope: Namespaced
  names:
    plural: mock-resources
    singular: mock-resource
    kind: MockResource
    listKind: MockResources
  versions:
    - name: v1
      storage: true
      served: true
      schema:
        openAPIV3Schema:
          type: object
          properties:
            status:
              type: object
              properties:
                statuses:
                  type: object
                  properties:
                    status1:
                      type: string
                    status2:
                      type: string
                podStatuses:
                  type: object
                  additionalProperties:
                    type: array
                    items:
                      type: string
                otherStatuses:
                  type: object
                  additionalProperties:
                    type: array
                    items:
                      type: string
                customConditions:
                  type: array
                  items:
                    type: object
                    properties:
                      lastTransitionTime:
                        type: string
                      lastUpdateTime:
                        type: string
                      message:
                        type: string
                      reason:
                        type: string
                      status:
                        type: string
                      type:
                        type: string
                otherCustomConditions:
                  type: array
                  items:
                    type: object
                    properties:
                      lastTransitionTime:
                        type: string
                      lastUpdateTime:
                        type: string
                      message:
                        type: string
                      reason:
                        type: string
                      status:
                        type: string
                      type:
                        type: string
              additionalProperties: true
            spec:
              type: object
              required:
                - password
                - select
              properties:
                password:
                  type: string
                  minLength: 1
                  maxLength: 25
                  pattern: "^[a-zA-Z0-9._\\-%]*$"
                number:
                  type: integer
                  minimum: 2
                  maximum: 4
                select:
                  type: string
                fieldGroup:
                  type: object
                  description: "[SCHEMA] field group - Quis cupidatat in sint occaecat quis dolore irure ea minim sint aliquip nisi aliquip."
                  title: "[SCHEMA] Field Group"
                  properties:
                    itemOne:
                      type: string
                    itemTwo:
                      type: integer
                arrayFieldGroup:
                  type: array
                  title: "[SCHEMA] Array Field Group"
                  description: "[SCHEMA] array field group - Quis excepteur nostrud qui sunt reprehenderit reprehenderit deserunt eu aute laboris id aliqua."
                  items:
                    type: object
                    properties:
                      itemOne:
                        type: string
                      itemTwo:
                        type: integer
                hiddenFieldGroup:
                  type: object
                  properties:
                    hiddenItem:
                      type: object
                podCount:
                  type: integer
                endpointList:
                  type: array
                  items:
                    type: object
                    additionalProperties: true
                resourceRequirements:
                  type: object
                  additionalProperties: true
                k8sResourcePrefix:
                  type: string
                booleanSwitch:
                  type: boolean
                checkbox:
                  type: boolean
                imagePullPolicy:
                  type: string
                updateStrategy:
                  type: object
                  additionalProperties: true
                text:
                  type: string
                nodeAffinity:
                  type: object
                  additionalProperties: true
                podAffinity:
                  type: object
                  additionalProperties: true
                podAntiAffinity:
                  type: object
                  additionalProperties: true
                advanced:
                  type: string
                fieldDependencyControl:
                  type: boolean
                fieldDependency:
                  type: string
                nestedFieldDependency:
                  type: object
                  properties:
                    enabled:
                      type: boolean
                    settings:
                      type: object
                      properties:
                        enabled:
                          type: boolean
                arrayFieldDependency:
                  type: array
                  items:
                    type: object
                    properties:
                      enabled:
                        type: boolean
                      dependent:
                        type: string
                hidden:
                  type: string
                objectWithArray:
                  type: object
                  properties:
                    name:
                      type: string
                    tags:
                      type: array
                      items:
                        type: string
                    birthday:
                      type: object
                      properties:
                        month:
                          type: number
                        day:
                          type: number
                        year:
                          type: number
                arrayWithObject:
                  type: array
                  items:
                    type: object
                    properties:
                      organization:
                        type: object
                        properties:
                          name:
                            type: string
                          address:
                            type: object
                            properties:
                              street:
                                type: string
                              city:
                                type: string
                              state:
                                type: string
                      current:
                        type: boolean
                      resourceRequirements:
                        type: object
                        properties: {}
                deeplyNested:
                  type: object
                  properties:
                    foo:
                      type: object
                      properties:
                        bar:
                          type: object
                          properties:
                            baz:
                              type: object
                              properties:
                                bat:
                                  type: object
                                  additionalProperties: true
---
apiVersion: operators.coreos.com/v1alpha1
kind: ClusterServiceVersion
metadata:
  name: mock-operator
  annotations:
    alm-examples: '[{"apiVersion":"test.tectonic.com/v1","kind":"MockResource","metadata":{"name":"mock-resource-instance","namespace":"operand-test","labels":{"automatedTestName":"operand-test"}},"spec":{"fieldGroup":{"itemOne":"Field group item 1","itemTwo":2},"arrayFieldGroup":[{"itemOne":"Array field group item 1","itemTwo":2}],"select":"WARN","k8sResourcePrefix":"operand-test","podCount":3,"endpointList":[{"port":8080,"scheme":"TCP"}],"label":"app=openshift","resourceRequirements":{"limits":{"cpu":"500m","memory":"50Mi","ephemeral-storage":"500Gi"},"requests":{"cpu":"500m","memory":"50Mi","ephemeral-storage":"500Gi"}},"namespaceSelector":{"matchNames":["default"]},"booleanSwitch":true,"password":"password123","checkbox":true,"imagePullPolicy":"Never","updateStrategy":{"type":"Recreate"},"text":"Some text","number":2},"status":{"podStatuses":{"ready":["pod-0","pod-1"],"unhealthy":["pod-2"],"stopped":["pod-3"]},"podCount":3,"w3Link":"https://google.com","conditions":[{"type":"Available","status":"True","lastUpdateTime":"2018-08-22T23:27:55Z","lastTransitionTime":"2018-08-22T23:27:55Z","reason":"AppReady","message":"App is ready."}],"text":"Some text","prometheusEndpoint":"my-svc.my-namespace.svc.cluster.local","k8sPhase":"Available","k8sPhaseReason":"AppReady"}}]'
spec:
  displayName: Mock Operator
  install:
    strategy: deployment
    spec:
      permissions: []
      deployments:
        - name: test-operator
          spec:
            replicas: 1
            selector:
              matchLabels:
                name: test-operator-alm-owned
            template:
              metadata:
                name: test-operator-alm-owned
                labels:
                  name: test-operator-alm-owned
              spec:
                serviceAccountName: test-operator
                containers:
                  - name: test-operator
                    image: nginx
  customresourcedefinitions:
    owned:
      - name: mock-resources.test.tectonic.com
        version: v1
        kind: MockResource
        displayName: Mock Resource
        description: Mock resource instance for testing descriptors
        resources: []
        specDescriptors:
          - path: fieldGroup
            displayName: "Field Group"
            description: "Lorem ipsum dolor sit amet"
          - path: fieldDependency
            description: fieldDependency - Voluptate ea tempor amet eiusmod.
            displayName: "Field Dependency"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:fieldDependency:fieldDependencyControl:true"
          - path: nestedFieldDependency.settings.enabled
            description: fieldDependency - Voluptate ea tempor amet eiusmod.
            displayName: "Nested Field Dependency"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:fieldDependency:nestedFieldDependency.enabled:true"
          - path: select
            description: select - Eu nisi fugiat occaecat laborum.
            displayName: "Select"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:select:DEBUG"
              - "urn:alm:descriptor:com.tectonic.ui:select:INFO"
              - "urn:alm:descriptor:com.tectonic.ui:select:WARN"
              - "urn:alm:descriptor:com.tectonic.ui:select:ERROR"
              - "urn:alm:descriptor:com.tectonic.ui:select:FATAL"
          - path: k8sResourcePrefix
            description: "k8sResourcePrefix - Amet magna ea exercitation sint et dolor deserunt quis."
            displayName: "K8s Resource Prefix"
            x-descriptors:
              - "urn:alm:descriptor:io.kubernetes:Project"
          - path: podCount
            description: "podCount - Quis laboris ea Lorem deserunt mollit commodo."
            displayName: "Pod Count"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:podCount"
          - path: endpointList
            description: "endpointList - Consequat nostrud anim labore nulla incididunt exercitation ex officia dolor Lorem consequat veniam."
            displayName: "Endpoint List"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:endpointList"
          - path: label
            description: "label - Aliqua voluptate qui do ullamco."
            displayName: "Label"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:label"
          - path: resourceRequirements
            description: "resourceRequirements - Laboris do non aliquip cupidatat sit irure."
            displayName: "Resource Requirements"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:resourceRequirements"
          - path: namespaceSelector
            description: "namespaceSelector - Esse magna exercitation Lorem exercitation officia exercitation excepteur id."
            displayName: "Namespace Selector"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:namespaceSelector"
          - path: booleanSwitch
            description: "booleanSwitch - Aliquip magna eu aute ea veniam ea culpa nulla."
            displayName: "Boolean Switch"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:booleanSwitch"
          - path: password
            description: "password - Et culpa officia eiusmod labore eiusmod occaecat."
            displayName: "Password"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:password"
          - path: checkbox
            description: "checkbox - Excepteur cillum quis proident sunt nulla ut in fugiat."
            displayName: "Checkbox"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:checkbox"
          - path: imagePullPolicy
            description: "imagePullPolicy - Ut adipisicing et aliqua tempor velit proident officia officia reprehenderit consequat voluptate irure esse."
            displayName: "Image Pull Policy"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:imagePullPolicy"
          - path: updateStrategy
            description: "updateStrategy - Amet minim ad cillum veniam exercitation excepteur aliqua anim cillum officia do aliquip."
            displayName: "Update Strategy"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:updateStrategy"
          - path: text
            description: "text - Culpa qui mollit velit do incididunt."
            displayName: "Text"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:text"
          - path: number
            description: "number - Eu dolore duis sit Lorem eu et ad veniam qui."
            displayName: "Number"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:number"
          - path: nodeAffinity
            description: "nodeAffinity - Labore officia esse consequat in sit ut laborum ex est elit tempor tempor."
            displayName: "Node Affinity"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:nodeAffinity"
          - path: podAffinity
            description: "podAffinity - Et sit aliquip fugiat nostrud ex enim reprehenderit mollit consequat laborum consectetur enim consequat."
            displayName: "Pod Affinity"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:podAffinity"
          - path: podAntiAffinity
            description: "podAntiAffinity - Laborum est magna ullamco qui nulla minim ut."
            displayName: "Pod Anti Affinity"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:podAntiAffinity"
          - path: advanced
            description: "advanced - Veniam ea aliqua aliqua sint proident consequat laborum sit laborum et deserunt est aliqua exercitation."
            displayName: "Advanced"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:advanced"
          - path: hidden
            description: "hidden - Sunt culpa Lorem ad ad ullamco."
            displayName: "Hidden"
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:hidden"
          - path: objectWithArray
            displayName: Object With Array
          - path: objectWithArray.tags
            displayName: Tags
          - path: "objectWithArray.tags[0]"
            displayName: Tag Element
          - path: objectWithArray.birthday.month
            displayName: Birth Month
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:number"
          - path: objectWithArray.birthday.day
            displayName: Birth Day
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:number"
          - path: objectWithArray.birthday.year
            displayName: Birth Year
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:number"
          - path: objectWithArray.name
            displayName: Name
          - path: arrayWithObject
            displayName: Array With Object
          - path: "arrayWithObject[0]"
            displayName: Element
          - path: "arrayWithObject[0].organization.name"
            displayName: Organization Name
          - path: "arrayWithObject[0].organization.address.street"
            displayName: Organization Street
          - path: "arrayWithObject[0].organization.address.city"
            displayName: Organization City
          - path: "arrayWithObject[0].organization.address.state"
            displayName: Organization State
          - path: "arrayWithObject[0].current"
            displayName: Is Current
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:checkbox"
          - path: "arrayWithObject[0].resourceRequirements"
            displayName: Resource Requirements
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:resourceRequirements"
          - path: "deeplyNested.foo.bar.baz.bat"
            displayName: Foo Bar Baz Bat
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:resourceRequirements"
          - path: deeplyNested
            displayName: Deeply Nested
          - path: arrayFieldDependency[0].dependent
            displayName: Dependent Field
            displayName: Field dependency inside an array element
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:fieldDependency:arrayFieldDependency[0].enabled:true"
        statusDescriptors:
          - path: statuses
            description: Invalid main status
            displayName: Status
          - path: podStatuses
            description: "podStatuses - Deserunt ea duis culpa nostrud veniam."
            displayName: Pod Statuses
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:podStatuses"
          - path: otherStatuses
            description: "otherStatuses - Deserunt ea duis culpa nostrud veniam."
            displayName: Other Statuses
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:podStatuses"
          - path: podCount
            description: "podCount - Culpa amet cupidatat ipsum commodo ad dolore reprehenderit dolore esse non culpa."
            displayName: Pod Count
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:podCount"
          - path: w3Link
            description: "w3Link - Minim in exercitation veniam laborum quis officia pariatur."
            displayName: W3 Link
            x-descriptors:
              - "urn:alm:descriptor:org.w3:link"
          - path: conditions
            description: "conditions - Exercitation magna eu tempor exercitation amet enim sit consectetur commodo esse consectetur."
            displayName: Conditions
            x-descriptors:
              - "urn:alm:descriptor:io.kubernetes.conditions"
          - path: text
            description: "text - Fugiat ipsum cillum elit aliqua ea fugiat esse eiusmod minim voluptate enim."
            displayName: Text
            x-descriptors:
              - "urn:alm:descriptor:text"
          - path: k8sPhase
            description: "k8sPhase - Sit cupidatat amet id voluptate do labore exercitation sit labore qui officia."
            displayName: K8s Phase
            x-descriptors:
              - "urn:alm:descriptor:io.kubernetes.phase"
          - path: k8sPhaseReason
            description: "k8sPhaseReason - Amet ad pariatur magna aliqua sit."
            displayName: K8s Phase Reason
            x-descriptors:
              - "urn:alm:descriptor:io.kubernetes.phase:reason"
          - path: hidden
            description: "hidden - Occaecat esse ea commodo duis do fugiat dolore excepteur dolore deserunt qui esse aliquip ipsum."
            displayName: Hidden
            x-descriptors:
              - "urn:alm:descriptor:com.tectonic.ui:hidden"
          - path: customConditions
            description: "Some custom defined condition list"
            displayName: "Custom Conditions"
            x-descriptors:
              - "urn:alm:descriptor:io.kubernetes.conditions"
          - path: otherCustomConditions
            description: "Some other custom defined condition list"
            displayName: "Other Custom Conditions"
            x-descriptors:
              - "urn:alm:descriptor:io.kubernetes.conditions"
      - name: mock-resources.test.tectonic.com
        version: v1
        kind: MockResource
        displayName: Mock Resource (v1)
        description: (v1) Mock resource instance for testing descriptors
        resources: []
      - name: mock-resources.test.tectonic.com
        version: v1
        kind: MockResource
        displayName: Mock Resource (v1)
        description: (v1) Mock resource instance for testing descriptors
        resources: []


2) explain the resource by command :
`oc explain mock-resources`

2) explain command failed:
oc explain mock-resources 
GROUP:      test.tectonic.com
KIND:       MockResource
VERSION:    v1error: template: plaintext:39:13: executing "plaintext" at <include "schema" (dict "gvk" $gvk "Document" $.Document "FieldPath" $.FieldPath "Recursive" $.Recursive)>: error calling include: template: plaintext:63:21: executing "schema" at <include "output" (set $ "schema" .)>: error calling include: template: plaintext:101:17: executing "output" at <include "fieldList" (dict "schema" $resolved "level" 1 "Document" $.Document "Recursive" $.Recursive)>: error calling include: template: plaintext:254:15: executing "typeGuess" at <.items>: can't evaluate field items in type bool

echo $?
1

The explain command should failed