[!BUG!] Debugging File Cuase Infinit Loop in Terminal

[ChaosGT]

Issue Type: Bug

It's very easy to reproduce the bug on my computer.

1. Open a single python file
2. Choose Debug -> Start without debugging
3. Repeat step 2 for several times

The running command may OCCASIONALLY INCLUDE ALL THE SYSTEM ENVIRONMENTS, cause the shell get System.ArgumentOutOfRangeException and repeat for many times.

PS C:\Users\xman\Desktop> cd 'c:\Users\xman\Desktop'; ${env:ALLUSERSPROFILE}='C:\ProgramData'; ${env:AMD_ENTRYPOINT}='vs/workbench/services/extensions/node/extensionHostProcess'; ${env:APPDATA}='C:\Users\xman\AppData\Roaming'; ${env:APPLICATION_INSIGHTS_NO_DIAGNOSTIC_CHANNEL}='true'; ${env:CLASSPATH}='.;C:\Program Files\Java\jdk1.8.0_151\lib;C:\Program Files\Java\jdk1.8.0_151\lib\tools.jar'; ${env:CommonProgramFiles}='C:\Program Files\Common Files'; ${env:CommonProgramFiles(x86)}='C:\Program Files (x86)\Common Files'; ${env:CommonProgramW6432}='C:\Program Files\Common Files'; ${env:COMPUTERNAME}='XPS13'; ${env:ComSpec}='C:\WINDOWS\system32\cmd.exe'; ${env:DriverData}='C:\Windows\System32\Drivers\DriverData'; ${env:ELECTRON_RUN_AS_NODE}='1'; ${env:HOMEDRIVE}='C:'; ${env:HOMEPATH}='\Users\xman'; ${env:JAVA_HOME}='C:\Program Files\Java\jdk1.8.0_151'; ${env:LOCALAPPDATA}='C:\Users\xman\AppData\Local'; ${env:LOGONSERVER}='\XPS13'; ${env:NUMBER_OF_PROCESSORS}='4'; ${env:OneDrive}='C:\Users\xman\OneDrive'; ${env:OS}='Windows_NT'; ${env:PATHEXT}='.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;.PYW'; ${env:PIPE_LOGGING}='true'; ${env:PROCESSOR_ARCHITECTURE}='AMD64'; ${env:PROCESSOR_IDENTIFIER}='Intel64 Family 6 Model 78 Stepping 3, GenuineIntel'; ${env:PROCESSOR_LEVEL}='6'; ${env:PROCESSOR_REVISION}='4e03'; ${env:ProgramData}='C:\ProgramData'; ${env:ProgramFiles}='C:\Program Files'; ${env:ProgramFiles(x86)}='C:\Program Files (x86)'; ${env:ProgramW6432}='C:\Program Files'; ${env:PSModulePath}='C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules\'; ${env:PT6HOME}='C:\Program Files (x86)\Cisco Packet Tracer 6.2sv'; ${env:PUBLIC}='C:\Users\Public'; ${en\b37e54c98e1a74ba89e03073e5a3761284e3ffb0'; ${env:VSCODE_PID}='3600'; ${env:VSCODE_PREVENT_FOREIGN_INSPECT}='true'; ${env:windir}='C:\WINDOWS'; ${env:Path}='C:\Program Files\Python37\Scripts\;C:\Program Files\Python37\;C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files\PuTTY\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Microsoft VS Code\bin;C:\Program Files\Java\jdk1.8.0_151\bin;C:\Program Files\Java\jdk1.8.0_151\jre\bin;C:\Program Files\Git\cmd;C:\Program Files\EmEditor;C:\Program Files\dotnet\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Users\xman\AppData\Local\Microsoft\WindowsApps;C:\Program Files\Bandizip\'; ${env:PYTHONIOENCODING}='UTF-8'; ${env:PYTHONUNBUFFERED}='1'; & 'C:\Program Files\Python37\python.exe' 'c:\Users\xman.vscode\extensions\ms-python.python-2019.9.34911\pythonFiles\ptvsd_launcher.py' '--default' '--nodebug' '--client' '--host' 'localhost' '--port' '7175' 'c:\Users\xman\Desktop\test.py' ……

Extension version: 2019.9.34911 VS Code version: Code 1.38.1 (b37e54c98e1a74ba89e03073e5a3761284e3ffb0, 2019-09-11T13:35:15.005Z) OS version: Windows_NT x64 10.0.18362

System Info

|Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz (4 x 2592)| |GPU Status|2d_canvas: enabled
flash_3d: enabled
flash_stage3d: enabled
flash_stage3d_baseline: enabled
gpu_compositing: enabled
multiple_raster_threads: enabled_on
native_gpu_memory_buffers: disabled_software
oop_rasterization: disabled_off
protected_video_decode: unavailable_off
rasterization: enabled
skia_deferred_display_list: disabled_off
skia_renderer: disabled_off
surface_synchronization: enabled_on
video_decode: enabled
viz_display_compositor: disabled_off
webgl: enabled
webgl2: enabled| |Load (avg)|undefined| |Memory (System)|7.86GB (2.13GB free)| |Process Argv|C:\Users\nixius\Desktop\test.py| |Screen Reader|no| |VM|50%|

[karrtikr]

I can confirm if we perform Start without debugging multiple times, all the environment variables are dumped in the terminal. But if you close the Python Debug console terminal, and use Start without debugging, the environment variables are not dumped again, please try that.

This does not seem to be an issue of the extension if an issue at all as we don't dump the variables, so you can reach out to https://github.com/Microsoft/vscode about it.

Closing this now.