BUG: NET 9 FL Crash When Trying to Start Process by Admin

[H5820121]

Since FL was updated to NET 9 there is a critical bug for some users, when in the search results you run a file as administrator (in the results of the program search), FL crashes. And when you try to get the normal Windows menu (ALT+ENTER), FL also crashes.
This is a known issue with NET 9, please see dotnet/runtime#109682 (comment).

@Jack251970
As far as I know, the FluentSearch developer who opened an issue for this bug due to a report from some of his users, did not find a solution for it and returned to the previous version (without the patch there).
Thanks!

This is the LOG of the crash from EV:

• System

  • Provider

  [ Name] Application Error
  [ Guid] {a0e9b465-b939-57d7-b27d-95d8e925ff57}

  EventID 1000

  Version 0

  Level 2

  Task 100

  Opcode 0

  Keywords 0x8000000000000000

  • TimeCreated

  [ SystemTime] 2025-08-04T13:51:03.9743216Z

  EventRecordID 45152

  Correlation

  • Execution

  [ ProcessID] 5876
  [ ThreadID] 11476

  Channel Application

  • Security

• EventData

  AppName Flow.Launcher.exe
  AppVersion 1.20.2.0
  AppTimeStamp 67200000
  ModuleName ntdll.dll
  ModuleVersion 10.0.26100.4768
  ModuleTimeStamp 95c61958
  ExceptionCode c0000409
  FaultingOffset 0000000000125e06
  ProcessId 0x36ac
  ProcessCreationTime 0x1dc0546918b9760
  AppPath C:\Users\AB\AppData\Local\FlowLauncher\app-1.20.2\Flow.Launcher.exe
  ModulePath C:\WINDOWS\SYSTEM32\ntdll.dll
  IntegratorReportId bf902e7f-5ade-4ebc-9b8c-875385c1251b
  PackageFullName
  PackageRelativeAppId

[Jack251970]

I wonder if <CETCompat>false</CETCompat> can help.

[H5820121]

I wonder if <CETCompat>false</CETCompat> can help.

@Jack251970
I'm not a developer, and I don't understand much about it, you can consult with the FluentSearch developer on Discord. I think he'd be happy to help from his experience, and as mentioned above, there was the same problem witn NET 9.

[H5820121]

@Jack251970

I wonder if <CETCompat>false</CETCompat> can help.

Now I saw that dotnet/runtime#109682 (comment) says that this solves the issue.
If you upload a version with the fix, I can try to see if it really solves this issue.
Thanks!

[Jack251970]

@Jack251970

I wonder if <CETCompat>false</CETCompat> can help.

Now I saw that dotnet/runtime#109682 (comment) says that this solves the issue. If you upload a version with the fix, I can try to see if it really solves this issue. Thanks!

Thanks! Here is the url: https://ci.appveyor.com/project/JohnTheGr8/flow-launcher/builds/52514609/artifacts

[H5820121]

@Jack251970
Yes, that solved the issue!
Thank you very much!
By the way, what about the F2?

[Jack251970]

@Jack251970 Yes, that solved the issue! Thank you very much! By the way, what about the F2?

F2? Do you mean this PR #3770?

If so, I am afraid this PR is still on its way since our team seems to be too busy to review these PRs :(

So please wait.