[Preview-2020.2.0] F5 works only once

[ili101]

Issue Type: Bug

Setup:

Preview-2020.2.0 + PS7
(Do not create launch.json)

Steps to reproduce:

1. F5 (file will run)
2. F5 (debugger will start and do nothing)

EditorServices.log
Extension version: 2020.2.0
VS Code version: Code 1.42.1 (c47d83b293181d9be64f27ff093689e8e7aed054, 2020-02-11T14:45:59.656Z)
OS version: Windows_NT x64 10.0.18363

System Info

Item	Value
CPUs	AMD Ryzen 7 1800X Eight-Core Processor (4 x 3593)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on oop_rasterization: disabled_off protected_video_decode: unavailable_off rasterization: unavailable_off skia_renderer: disabled_off surface_control: disabled_off surface_synchronization: enabled_on video_decode: enabled viz_display_compositor: enabled_on viz_hit_test_surface_layer: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	4.00GB (1.57GB free)
Process Argv
Screen Reader	no
VM	100%

[TylerLeonhardt]

@ili101 do you have any workspace open?

I've tried this on PS6 and PS7 and can't repro the behavior you're seeing. The only difference right now is that I'm on macOS and you're on Windows.

Also as a troubleshooting step, if you hit enter in the console before hitting F5 a second time, does that work?

[ili101]

It happens with and without workspace.
I tested it only on windows.
Hitting enter or Ctrl+C between F5s actually prevent the problem.
Maybe another clue after the second F5 if I F6 to pause it stops on a temporary AppData\Local\Temp\PSES-2376\[ILI] Script Listing.ps1 script with only 0 in it.

[TylerLeonhardt]

That's really great information @ili101. Thank you!

[TylerLeonhardt]

I was unable to repro this on Windows, however, I did reproduce this on @SydneyhSmith 's machine.

It seems to happen when a machine is totally bogged down and so the PowerShell extension runs very slowly and gets into some bad state.

Still investigating...

[TylerLeonhardt]

I'm able to reproduce when I comment out my personal changes to the prompt function.

[rjmholt]

This seems to have the same root cause as #2364