Causes typescript formatter to hang

[glenatmake]

Issue Type: Bug

Saving a typescript file, VS code shows:

Saving 'index.tsx': Running 'TypeScript and JavaScript Language Features' Formatter (configure).

and stops compiling.

Extension version: 1.20.0 VS Code version: Code 1.60.1 (83bd43bc519d15e50c4272c6cf5c1479df196a4d, 2021-09-10T17:09:14.403Z) OS version: Darwin x64 20.5.0 Restricted Mode: No

System Info

|Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz (12 x 2600)| |GPU Status|2d_canvas: unavailable_software
gpu_compositing: disabled_software
metal: disabled_off
multiple_raster_threads: enabled_on
oop_rasterization: disabled_off
opengl: disabled_off
rasterization: disabled_software
skia_renderer: disabled_off_ok
video_decode: disabled_software
webgl: unavailable_software
webgl2: unavailable_software| |Load (avg)|9, 7, 6| |Memory (System)|32.00GB (0.89GB free)| |Process Argv|--crash-reporter-id 7fc01d93-8d66-4f3b-8a3f-24f862e041d6| |Screen Reader|no| |VM|0%|

A/B Experiments

``` vsliv368cf:30146710 vsreu685:30147344 python383cf:30185419 pythonvspyt700cf:30270857 pythonvspyt602:30300191 vspor879:30202332 vspor708:30202333 vspor363:30204092 pythonvspyt639:30300192 pythontb:30283811 pythonvspyt551:30345470 pythonptprofiler:30281270 vshan820:30294714 vstes263cf:30335440 pythondataviewer:30285071 pythonvsuse255:30340121 vscod805:30301674 pythonvspyt200:30340761 vscextlang:30333561 binariesv615:30325510 vsccppwt:30364497 pythonvssor306:30344512 bridge0708:30335490 pygetstartedc2:30360494 bridge0723:30353136 pythonrunftest32:30365366 pythonf5test824cf:30361778 javagetstartedt:30364666 pythonvspyt187cf:30365362 pydsgsc2:30361791 vssid140cf:30363604 vssur157:30367808 ```