message: Check for `symbol.declarations`
diff: @@ -23,7 +23,7 @@ export class ExportConverter extends ConverterNodeComponent<ts.ExportAssignment>
  let type = context.getTypeAtLocation(node.expression);
  symbol = type ? type.symbol : undefined;
  }
  - if (symbol) {
  + if (symbol && symbol.declarations) {
  const project = context.project;
  // if the symbol declarations are undefined due to an export, we skip it
  // fixes https://github.com/TypeStrong/typedoc/issues/513
  