Regex Workbench causes the extension host to crash

[kanadaj]

Issue Type: Bug

1. Install Regex Workbench
2. Open an scss file (others might work too, unsure)

Extension version: 2.0.5 VS Code version: Code 1.69.2 (3b889b090b5ad5793f524b5d1d39fda662b96a2a, 2022-07-18T16:12:52.460Z) OS version: Windows_NT x64 10.0.22000 Restricted Mode: No

System Info

|Item|Value| |---|---| |CPUs|AMD Ryzen 9 5950X 16-Core Processor (32 x 3394)| |GPU Status|2d_canvas: enabled
canvas_oop_rasterization: disabled_off
direct_rendering_display_compositor: disabled_off_ok
gpu_compositing: enabled
multiple_raster_threads: enabled_on
opengl: enabled_on
rasterization: enabled
raw_draw: disabled_off_ok
skia_renderer: enabled_on
video_decode: enabled
video_encode: enabled
vulkan: disabled_off
webgl: enabled
webgl2: enabled| |Load (avg)|undefined| |Memory (System)|63.94GB (37.85GB free)| |Process Argv|--crash-reporter-id c85f0dcd-b3c4-487a-87ef-eb6c5cd9aae6| |Screen Reader|no| |VM|0%|

A/B Experiments

``` vsliv368:30146709 vsreu685:30147344 python383cf:30185419 vspor879:30202332 vspor708:30202333 vspor363:30204092 vslsvsres303:30308271 pythonvspyl392:30443607 vserr242:30382549 pythontb:30283811 vsjup518:30340749 pythonptprofiler:30281270 vshan820:30294714 vstes263:30335439 vscoreces:30445986 pythondataviewer:30285071 vscod805cf:30301675 binariesv615:30325510 bridge0708:30335490 bridge0723:30353136 vsaa593cf:30376535 vsc1dst:30438360 pythonvs932:30410667 wslgetstarted:30449410 vscscmwlcmt:30465135 cppdebug:30492333 vscaat:30438848 pylanb8912cf:30529770 vsclangdf:30486550 c4g48928:30535728 ```