Reproduces issue in openapi-generator

openapi-gen-go-reflect-import-bug.sh

cd "$(mktemp -d)" || exit

cat << EOF > go.mod
module github.com/OpenAPITools/bugs

go 1.22.2
EOF

# Example that doesn't compile
cat << 'EOF' > fail_schema.yaml
openapi: 3.0.0
info:
  version: '1.0.0'
  title: '-'
paths:
  /req:
    get:
      summary: Request
      operationId: Request
      requestBody:
        content:
          application/x-www-form-urlencoded:
            schema:
              $ref: '#/components/schemas/Req'
            encoding:
              prop:
                contentType: application/json
      responses:
        '200':
          description: OK
components:
  schemas:
    Req:
      type: object
      properties:
        prop:
          type: array
          items:
            type: integer
EOF

docker run --rm -v "${PWD}:/local" openapitools/openapi-generator-cli:latest generate \
        --input-spec /local/fail_schema.yaml \
        --generator-name go \
        --additional-properties "withGoMod=false" \
        --package-name gen \
        --output /local/gen_fail

printf "\nExpecting failed go build:\n"
go build ./gen_fail # gen_fail/api_default.go:19:2: "reflect" imported and not used