getIndentation fails with JsxElement

[saschanaz]

/// <reference path='fourslash.ts' />

//@Filename: file.tsx
////(function () {
////    return (
////        <div>
////            <div>
////            </div>
////            /*indent2*/
////        </div>
////    )
////})


format.document();
goTo.marker("indent2");
verify.indentationIs(12);

This causes error (in master branch):

Error: Debug Failure. False expression:
 at Object.assert (eval at <anonymous> (C:\Users\sasch_000\Documents\GitHub\typescript-f\built\local\run.js:53472:13), <anonymous>:1549:23)

Inserting a text line prevents this error. (foo)

//@Filename: file.tsx
////(function () {
////    return (
////        <div>
////            <div>
////            </div>
////            foo
////            /*indent2*/
////        </div>
////    )
////})

[DanielRosenwasser]

More minimal repro (#4515) is

<div>/**/

with a stack trace of

Description:

getIndentationAtPosition('C:\Users\drosen\file1.tsx', 7)

Message:

StackTrace:

Error: Debug Failure. False expression: 
   at assert (:1558:17)
   at find (:38781:13)
   at find (:38776:29)
   at find (:38776:29)
   at find (:38776:29)
   at findPrecedingToken (:38751:9)
   at getIndentation (:41411:17)
   at getIndentationAtPosition (:47287:13)
   at Anonymous function (:48969:17)
   at simpleForwardCall (:48727:9)
   at forwardJSONCall (:48743:13)
   at forwardJSONCall (:48789:13)
   at getIndentationAtPosition (:48967:13)