JSDoc syntax for optional parameter causes description to disappear from intellisense

[rummelsworth]

TypeScript Version: within VS Code 1.3.1

JSDoc syntax for optional parameters (e.g. {number} [parameterName] Description) seems to cause the parameter description to not get picked up for intellisense.

Closure Compiler syntax (e.g. {number=} parameterName Description) does not cause the same problem.

Code

/**
 * @param {number} [x] Description
 */
function foo (x) { }

Expected behavior:

Hovering over x in the function declaration shows "Description", like this:

Actual behavior:

[sandersn]

Is this a typescript file or a javascript file?

[sandersn]

Never mind, it repros for both javascript and typescript.

[sandersn]

Duplicate of #6810