Failed to read environment variable [DOTNET_STARTUP_HOOKS], HRESULT: 0x800700CB

[pedoc]

Description

in vs17.6.3,the following error message is displayed in eventvwr

Description: A .NET application failed.
Application: ServiceHub.IndexingService.exe
Path: C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\ServiceHub\Hosts\ServiceHub.Host.Dotnet.x64\ServiceHub.IndexingService.exe
Message: Failed to read environment variable [DOTNET_STARTUP_HOOKS], HRESULT: 0x800700CB

Description: A .NET application failed.
Application: ServiceHub.DataWarehouseHost.exe
Path: C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\ServiceHub\Hosts\ServiceHub.Host.Dotnet.x64\ServiceHub.DataWarehouseHost.exe
Message: Failed to read environment variable [DOTNET_STARTUP_HOOKS], HRESULT: 0x800700CB

Description: A .NET application failed.
Application: ServiceHub.IndexingService.exe
Path: C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\ServiceHub\Hosts\ServiceHub.Host.Dotnet.x64\ServiceHub.IndexingService.exe
Message: Failed to read environment variable [DOTNET_STARTUP_HOOKS], HRESULT: 0x800700CB

Reproduction Steps

Currently every launch of vs triggers this error.

Expected behavior

no error

Actual behavior

something went wrong

Regression?

No response

Known Workarounds

No response

Configuration

.NET SDK:
 Version:   8.0.100-preview.6.23316.2
 Commit:    5071f1f4ed

 OS Name:     Windows
 OS Version:  10.0.25393
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\8.0.100-preview.6.23316.2\

Host:
  Version:      8.0.0-preview.6.23315.6
  Architecture: x64
  Commit:       35a5afb63f

Other information

No response

[pedoc]

If I downgrade to 7.0.7 everything works fine

Host:
  Version:      7.0.7
  Architecture: x64
  Commit:       5b20af47d9

[pedoc]

works fine too

Host:
  Version:      8.0.0-preview.5.23280.8
  Architecture: x64
  Commit:       bc78804f5d

Tagging subscribers to this area: @vitek-karas, @agocke, @VSadov
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Description

in vs17.6.3,the following error message is displayed in eventvwr

Description: A .NET application failed.
Application: ServiceHub.IndexingService.exe
Path: C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\ServiceHub\Hosts\ServiceHub.Host.Dotnet.x64\ServiceHub.IndexingService.exe
Message: Failed to read environment variable [DOTNET_STARTUP_HOOKS], HRESULT: 0x800700CB

Description: A .NET application failed.
Application: ServiceHub.DataWarehouseHost.exe
Path: C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\ServiceHub\Hosts\ServiceHub.Host.Dotnet.x64\ServiceHub.DataWarehouseHost.exe
Message: Failed to read environment variable [DOTNET_STARTUP_HOOKS], HRESULT: 0x800700CB

Description: A .NET application failed.
Application: ServiceHub.IndexingService.exe
Path: C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\ServiceHub\Hosts\ServiceHub.Host.Dotnet.x64\ServiceHub.IndexingService.exe
Message: Failed to read environment variable [DOTNET_STARTUP_HOOKS], HRESULT: 0x800700CB

Reproduction Steps

Currently every launch of vs triggers this error.

Expected behavior

no error

Actual behavior

something went wrong

Regression?

No response

Known Workarounds

No response

Configuration

.NET SDK:
 Version:   8.0.100-preview.6.23316.2
 Commit:    5071f1f4ed

 OS Name:     Windows
 OS Version:  10.0.25393
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\8.0.100-preview.6.23316.2\

Host:
  Version:      8.0.0-preview.6.23315.6
  Architecture: x64
  Commit:       35a5afb63f

Other information

No response

Author:	pedoc
Assignees:	-
Labels:	area-Host, untriaged, needs-area-label
Milestone:	-

[danmoseley]

other reports
https://learn.microsoft.com/en-us/answers/questions/1291663/vs2022-debugger-crash-with-error-failed-to-read-en
dotnet/aspnetcore#48274

[vitek-karas]

This is a duplicate of #82260. It has been fixed in .NET 8. We may want to backport the fix to .NET 7 I guess.

@agocke, what do you think?

[vitek-karas]

Note that this only happens because something sets the env. variable to an empty string value (instead of clearing it entirely), but the host should not do this regardless.

[agocke]

Yup, worth backporting.

[pedoc]

This is a duplicate of #82260.

I don't think this is a duplicate. I didn't find it in my local environment variables, nor have I ever set this environment variable manually.

This exists in 8.0.preview.6, but not in 8.0.preview.5 and .net7, maybe a regression?

[danmoseley]

That doesn't mean that VS doesn't set it though

[pedoc]

That doesn't mean that VS doesn't set it though

Makes sense, maybe there is a way to get the environment variables of the vs process (including those set by itself)?