Repeated enum invalid TypeScript, TS1011 error

[leeola]

In the following example:

syntax = "proto3";

message SearchRequest {
  string query = 1;
  int32 page_number = 2;
  int32 result_per_page = 3;
  enum Corpus {
    UNIVERSAL = 0;
    WEB = 1;
    IMAGES = 2;
    LOCAL = 3;
    NEWS = 4;
    PRODUCTS = 5;
    VIDEO = 6;
  }
  repeated Corpus corpuses = 4;
}

message Result {
  string title = 1;
}

message SearchResponse {
  repeated Result result = 1;
}

service SearchService {
  rpc Search (SearchRequest) returns (SearchResponse);
}

The repeated Corpus corpuses = 4; produces a typescript line of return (<any>Corpus[])[this._json.corpuses!], which causes a failure of:

output/example_003.ts:78:25 - error TS1011: An element access expression should take an argument.

78     return (<any>Corpus[])[this._json.corpuses!]

I'm not too familiar with TypeScript syntax here, but the bug should be fairly easy to reproduce. Thoughts?

[yash2code]

same issue