Runing a raw cell breaks execution of other cells

[per11235813]

Issue Type: Bug

Make a blank notebook add three cells

1. A python cell, eg a=1
2. A cell with some text, change the type to "raw"
3. Another python cell eg b=2

Now select "Run all". Cell 1 is run, but after trying to run cell 2 of type "raw" all cell execution stalls.

If you now try to run a code cell, it gets the pending state (left corner, clock with an arrow around)

Recovery by restarting the kernel.

Same behavior is observed in the stable release.

Extension version: 2021.8.1081660962
VS Code version: Code - Insiders 1.59.0-insider (ba0df885e9d6b0f0ccf2cc714c3fa31423572205, 2021-07-31T00:41:55.692Z)
OS version: Windows_NT x64 10.0.18362
Restricted Mode: No

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-8350U CPU @ 1.70GHz (8 x 1896)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on rasterization: enabled skia_renderer: enabled_on video_decode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	31.85GB (13.75GB free)
Process Argv	--crash-reporter-id 9cb47b31-118f-4a63-91f9-b13170eb2d06
Screen Reader	no
VM	0%

A/B Experiments

vsliv695:30137379
vsins829:30139715
vsliv368cf:30146710
vsreu685:30147344
python383:30185418
pythonvspyt602:30291494
vspor879:30202332
vspor708:30202333
vspor363:30204092
pythonvspyt639:30291487
pythontb:30258533
pythonptprofiler:30281269
vsdfh931:30280409
vshan820:30294714
pythondataviewer:30285072
pythonvsuse255:30319630
vscod805cf:30301675
pythonvspyt200:30323110
vsccppwtct:30312693
pythonvssor306:30340298
bridge0708:30335490
dockerwalkthru:30344901

[greazer]

Thanks for the report, we have fixed this. It should appear in tomorrow's Insiders build.