type-graphql: Generic argument validation error is thrown with no indication of the field that is causing it

Describe the bug Given an InputType field with validation

@InputType()
export class CatalogInput implements Partial<Catalog> {
  @Field()
  id: number;
  @MaxLength(1000)
  @Field({ nullable: true })
  description?: string;
}

and a mutation

@Mutation(returns => CatalogUpdateResult)
updateCatalog(
  @Arg("catalog", () => CatalogInput, { validate: true })
  catalog: CatalogInput
): CatalogUpdateResult {
  return { catalog };
}

when I try to sent mutation to the server with a value exceeding the limit, then I get a very generic error that does not indicate which field caused it, the locations array is empty:

{
  "errors": [
    {
      "message": "Argument Validation Error",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "updateCatalog"
      ],
      "extensions": {
        "code": "INTERNAL_SERVER_ERROR",
        "exception": {
          "errors": [
            {
              "message": "Argument Validation Error",
              "locations": [],
              "path": [
                "updateCatalog"
              ]
            }
          ],
 ...

Expected behavior I would expected to have the information about what caused the failure, i.e. the location array containing the information.

Enviorment (please complete the following information):

• OS: Windows
• Node 10.15.3
• Package version 0.17.1
• TypeScript version 3.3.3333

Thanks, Karel