ExtensionTests.cs is crashing the extension

Type: Bug

https://github.com/dotnet/roslyn/blob/main/src/Compilers/CSharp/Test/Emit3/Semantics/ExtensionTests.cs makes the extension very unhappy. It starts with being slow, then usually crashes after a few edits/completion invocations/quickinfos/ctrl+.s, etc.

Extension version: 2.74.24
VS Code version: Code - Insiders 1.100.0-insider (cb66f895f960afe46db5f13a622d9dd9aea9bc8e, 2025-04-23T05:04:01.426Z)
OS version: Linux x64 6.8.0-58-generic
Modes:

System Info

|Item|Value|
|---|---|
|CPUs|Intel(R) Core(TM) i9-10900K CPU @ 3.70GHz (20 x 4800)|
|GPU Status|2d_canvas: enabled
canvas_oop_rasterization: enabled_on
direct_rendering_display_compositor: disabled_off_ok
gpu_compositing: disabled_software
multiple_raster_threads: enabled_on
opengl: enabled_on
rasterization: enabled
raw_draw: disabled_off_ok
skia_graphite: disabled_off
video_decode: enabled
video_encode: disabled_software
vulkan: disabled_off
webgl: enabled_readback
webgl2: enabled_readback
webgpu: disabled_off
webnn: disabled_off|
|Load (avg)|4, 8, 6|
|Memory (System)|62.57GB (29.96GB free)|
|Process Argv|--crash-reporter-id 24e34cc7-37e5-4d66-b96a-cc688962bc53|
|Screen Reader|no|
|VM|0%|
|DESKTOP_SESSION|regolith-x11|
|XDG_CURRENT_DESKTOP|Regolith:GNOME-Flashback:GNOME|
|XDG_SESSION_DESKTOP|regolith-x11|
|XDG_SESSION_TYPE|x11|

A/B Experiments

```
vsliv368cf:30146710
vspor879:30202332
vspor708:30202333
vspor363:30204092
vswsl492cf:30256198
pythonvspyt551:31249597
vscod805cf:30301675
c4g48928:30535728
vscrpc:30624061
2i9eh265:30646982
962ge761:30841072
dsvsc014:30777825
dsvsc015:30821418
2e7ec940:31000449
pythontbext0:30879054
cppperfnew:30980852
dwnewjupytercf:31046870
pythonrstrctxt:31093868
nativeloc1:31118317
e80f6927:31120813
dwcopilot:31158714
c3hdf307:31184662
471b6256:31240254
6074i472:31201624
dwoutputs:31242946
customenabled:31248079
hdaa2157:31222309
copilot_t_ci:31222730
g012b348:31231168
pythoneinst12:31251391
bgtreat:31252123
c7cif404:31294349
31787653:31262186
3e8i5726:31271747
pythonpulldiag:31287486
6gi0g917:31259950
61ibe868:31282443
996jf627:31264550
pythonrdcb7:31268811
usemplatestapi:31297334
i53e4855:31297587
747dc170:31275146
pythoncompactctx:31296835
g20af354:31278749
9hi5e907:31296557
pylancecolor:31288664
generatesymbolt:31280541
convertfstringf:31280702
gendocf:31280703
pylancequickfixf:31296867

```