Dynamic function name causes no symbol returned

[octref]

TypeScript Version: 3.7.0-dev.20190924

Search Terms:

• dynamic function name

Code

function createTimesFunction(factor){
	const name='times_'+factor;
	return {[name]: function(x){return x*factor;} }[name];
}

Expected behavior:
TS Server returns symbol createTimesFunction

Actual behavior:
TS Server fails with below stacks trace:

[Error - 17:34:36] Error while computing document symbols for file:///my/path/to/index.html: Cannot read property 'length' of undefined
TypeError: Cannot read property 'length' of undefined
    at Object.unescapeLeadingUnderscores (d:\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\typescript.js:13211:19)
    at tryGetName (d:\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\typescript.js:105875:27)
    at compareChildren (d:\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\typescript.js:105861:78)
    at Array.sort (native)
    at sortChildren (d:\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\typescript.js:105858:22)
    at endNode (d:\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\typescript.js:105614:17)
    at addNodeWithRecursiveChild (d:\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\typescript.js:105621:13)
    at addChildrenRecursively (d:\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\typescript.js:105704:21)
    at rootNavigationBarNode (d:\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\typescript.js:105580:17)
    at Object.getNavigationBarItems (d:\Programs\Microsoft VS Code\resources\app\extensions\node_modules\typescript\lib\typescript.js:105535:45)

Playground Link:

N/A. TS compiles this fine but TS Server fails.

Related Issues: Nope.

Ref: microsoft/vscode#78658

[RyanCavanaugh]

Thanks for the nice repro with call stack!

[elibarzilay]

@octref: I tried it now, and it looks like it's working fine with show-all-symbols and with completions. Can you try it again please?