Argument Validation Error is not showing 'validationErrors' information

[xmanemran]

I'm trying to make a UpdateUserInput with the following content.

import { Length } from 'class-validator';
import { Field, InputType } from 'type-graphql';

@InputType()
export class UpdateUserInput {
  @Length(2, 50)
  @Field({ nullable: true })
  firstName?: string;

  @Length(2, 50)
  @Field({ nullable: true })
  lastName?: string;
}

And use this Input in bellow Mutation

@Mutation(() => User)
  async updateMe(
    @Arg('updateUser') { firstName, lastName }: UpdateUserInput,
    @Ctx() ctx: RequestContext,
  ): Promise<User> {
    .....
    return user;
  }

The issue is when I try to invoke updateMe mutation I get the error(which is obvious), but the error message doesn't content validationErrors fields. Below is an example of the error message I receive.

{
  "data": {},
  "errors": [
    {
      "message": "Argument Validation Error",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "updateMe"
      ],
      "extensions": {
        "code": "INTERNAL_SERVER_ERROR",
        "stacktrace": [
          "Error: Argument Validation Error",
          "    at validateArg (/**/node_modules/type-graphql/dist/resolvers/validate-arg.js:55:15)",
          "    at processTicksAndRejections (node:internal/process/task_queues:95:5)",
          "    at async Promise.all (index 0)"
        ]
      }
    }
  ]
}

I try to debug a bit. When I add a console in validate-arg.js:55 I can see the error.
Another related issue is If I remove all the "class-validator" decorators but give a valid input I still receive the same generic error message and this is what validate-arg.js:55 says

[
  ValidationError {
    target: UpdateUserInput { firstName: 'User1', lastName: '' },
    value: undefined,
    property: undefined,
    children: [],
    constraints: {
      unknownValue: 'an unknown value was passed to the validate function'
    }
  }
]

I'm not sure if I miss any configuration to show the error or not. Bellow is project configuration.

package.json

"@apollo/server": "^4.3.3",
"@apollo/subgraph": "^2.3.2",
"class-validator": "^0.14.0",
"mongodb": "^3.6.0",
"reflect-metadata": "^0.1.13",
"type-graphql": "^2.0.0-beta.1",
"typeorm": "^0.3.12",

[carlocorradini]

Already fixed. See #1397

[xmanemran]

thanks