Get an incomprehensible error on generation

[defgenx]

I am trying to generate Go code from an OpenAPI 3 file and it just crash. I don't have any hint. Someone can help me (it does the same when I use the local file) ?

gnostic --resolve-refs --go-generator-out=./gen https://raw.githubusercontent.com/Terminal49/t49-api-documentation/master/docs/reference/terminal49/terminal49.v1.json
Errors reading https://raw.githubusercontent.com/Terminal49/t49-api-documentation/master/docs/reference/terminal49/terminal49.v1.json
Plugin error: [client.go:24:26: expected '(', found '-' (and 4 more errors) server.go:28:15: expected '(', found '-' (and 10 more errors) provider.go:14:4: expected ';', found '-' (and 1 more errors) types.go:226:9: expected type, found '-' (and 10 more errors)]

[tomaxsas]

same here with default openapi petstore example

[zalent@zalent go-xstream]$ gnostic petstore.yaml --go-client-out=gnpet
Errors reading petstore.yaml
Plugin error: [types.go:111:36: expected ';', found '[' (and 1 more errors)]

[henrikrudstrom]

same

[skymeyer]

For me this was caused by using additionalProperties in my openapi spec.