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Application crashes when focusFollowMouse is enabled #19937

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opened 2026-01-31 06:58:00 +00:00 by claunia · 8 comments
claunia commented 2026-01-31 06:58:00 +00:00
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Originally created by @pol73 on GitHub (May 24, 2023).

Windows Terminal version

1.18.1421.0

Windows build number

22621.1344

Other Software

WSL
FarManager

Steps to reproduce

Open profile entry.

Expected Behavior

Open screen of application.

Actual Behavior

WindowsTermninal application aborted with error:

Faulting application name: WindowsTerminal.exe, version: 1.18.2305.22001, time stamp: 0x646c16cf
Faulting module name: ucrtbase.dll, version: 10.0.22621.608, time stamp: 0xf5fc15a3
Exception code: 0xc0000409
Fault offset: 0x000000000007f61e
Faulting process id: 0x0xEB4
Faulting application start time: 0x0x1D98DEF4ED2D0CD
Faulting application path: C:\Program Files\WindowsApps\Microsoft.WindowsTerminalPreview_1.18.1421.0_x64__8wekyb3d8bbwe\WindowsTerminal.exe
Faulting module path: C:\WINDOWS\System32\ucrtbase.dll
Report Id: d5f35825-bb26-459f-91ef-20e1e8e5c9cc
Faulting package full name: Microsoft.WindowsTerminalPreview_1.18.1421.0_x64__8wekyb3d8bbwe
Faulting package-relative application ID: App

Fault bucket , type 0
Event Name: MoBEX
Response: Not available
Cab Id: 0

Problem signature:
P1: Microsoft.WindowsTerminalPreview_1.18.1421.0_x64__8wekyb3d8bbwe
P2: praid:App
P3: 1.18.2305.22001
P4: 646c16cf
P5: ucrtbase.dll
P6: 10.0.22621.608
P7: f5fc15a3
P8: 000000000007f61e
P9: c0000409
P10: 0000000000000007

Attached files:

These files may be available here:
\?\C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_Microsoft.Window_c2d345a83ebd4f63f65431ce4b20f769d6644d_03f0cf04_e1e6e590-85ca-4740-a653-a1e60ec30e78

Analysis symbol:
Rechecking for solution: 0
Report Id: d5f35825-bb26-459f-91ef-20e1e8e5c9cc
Report Status: 4100
Hashed bucket:
Cab Guid: 0

Fault bucket 1525387907268971424, type 5
Event Name: MoBEX
Response: Not available
Cab Id: 0

Problem signature:
P1: Microsoft.WindowsTerminalPreview_1.18.1421.0_x64__8wekyb3d8bbwe
P2: praid:App
P3: 1.18.2305.22001
P4: 646c16cf
P5: ucrtbase.dll
P6: 10.0.22621.608
P7: f5fc15a3
P8: 000000000007f61e
P9: c0000409
P10: 0000000000000007

Attached files:
\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER.86404f2d-8a99-494e-9315-eeb0acc11a2a.tmp.WERInternalMetadata.xml

These files may be available here:
\?\C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_Microsoft.Window_c2d345a83ebd4f63f65431ce4b20f769d6644d_03f0cf04_e1e6e590-85ca-4740-a653-a1e60ec30e78

Analysis symbol:
Rechecking for solution: 0
Report Id: d5f35825-bb26-459f-91ef-20e1e8e5c9cc
Report Status: 268439552
Hashed bucket: 48cb60da2fa68c80e52b443845718ba0
Cab Guid: 0

Originally created by @pol73 on GitHub (May 24, 2023). ### Windows Terminal version 1.18.1421.0 ### Windows build number 22621.1344 ### Other Software WSL FarManager ### Steps to reproduce Open profile entry. ### Expected Behavior Open screen of application. ### Actual Behavior WindowsTermninal application aborted with error: Faulting application name: WindowsTerminal.exe, version: 1.18.2305.22001, time stamp: 0x646c16cf Faulting module name: ucrtbase.dll, version: 10.0.22621.608, time stamp: 0xf5fc15a3 Exception code: 0xc0000409 Fault offset: 0x000000000007f61e Faulting process id: 0x0xEB4 Faulting application start time: 0x0x1D98DEF4ED2D0CD Faulting application path: C:\Program Files\WindowsApps\Microsoft.WindowsTerminalPreview_1.18.1421.0_x64__8wekyb3d8bbwe\WindowsTerminal.exe Faulting module path: C:\WINDOWS\System32\ucrtbase.dll Report Id: d5f35825-bb26-459f-91ef-20e1e8e5c9cc Faulting package full name: Microsoft.WindowsTerminalPreview_1.18.1421.0_x64__8wekyb3d8bbwe Faulting package-relative application ID: App -------------------------------------- Fault bucket , type 0 Event Name: MoBEX Response: Not available Cab Id: 0 Problem signature: P1: Microsoft.WindowsTerminalPreview_1.18.1421.0_x64__8wekyb3d8bbwe P2: praid:App P3: 1.18.2305.22001 P4: 646c16cf P5: ucrtbase.dll P6: 10.0.22621.608 P7: f5fc15a3 P8: 000000000007f61e P9: c0000409 P10: 0000000000000007 Attached files: These files may be available here: \\?\C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_Microsoft.Window_c2d345a83ebd4f63f65431ce4b20f769d6644d_03f0cf04_e1e6e590-85ca-4740-a653-a1e60ec30e78 Analysis symbol: Rechecking for solution: 0 Report Id: d5f35825-bb26-459f-91ef-20e1e8e5c9cc Report Status: 4100 Hashed bucket: Cab Guid: 0 --------------------------- Fault bucket 1525387907268971424, type 5 Event Name: MoBEX Response: Not available Cab Id: 0 Problem signature: P1: Microsoft.WindowsTerminalPreview_1.18.1421.0_x64__8wekyb3d8bbwe P2: praid:App P3: 1.18.2305.22001 P4: 646c16cf P5: ucrtbase.dll P6: 10.0.22621.608 P7: f5fc15a3 P8: 000000000007f61e P9: c0000409 P10: 0000000000000007 Attached files: \\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER.86404f2d-8a99-494e-9315-eeb0acc11a2a.tmp.WERInternalMetadata.xml These files may be available here: \\?\C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_Microsoft.Window_c2d345a83ebd4f63f65431ce4b20f769d6644d_03f0cf04_e1e6e590-85ca-4740-a653-a1e60ec30e78 Analysis symbol: Rechecking for solution: 0 Report Id: d5f35825-bb26-459f-91ef-20e1e8e5c9cc Report Status: 268439552 Hashed bucket: 48cb60da2fa68c80e52b443845718ba0 Cab Guid: 0
claunia commented 2026-01-31 06:58:02 +00:00
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@zadjii-msft commented on GitHub (May 24, 2023):

BucketDetails?BucketIdentifier=48cb60da-2fa6-8c80-e52b-443845718ba0 seems to have... two different failures in it?

  • The first was from a test machine, so I'm not sure how real that is
  • Failure?FailureSearchText=99935d8e-2b64-88fd-6c7d-2215bf2e8270 is FAIL_FAST_FATAL_APP_EXIT_c0000409_TerminalApp.dll!winrt::Windows::Foundation::IUnknown::try_as_winrt::Microsoft::Terminal::Control::TermControl_
    • There's only a couple cabs here... maybe not enough to work with?
    • Filed as MSFT:44764490

Looks like the crash is attributed to L959 here:
c589784b54/src/cascadia/TerminalApp/TerminalTab.cpp (L953-L965)

Do you happen to have focusFollowMouse enabled?

I suppose just looking at that code, we're taking the parameter by reference, which is bad for a coroutine. I don't really think this should have regressed in 1.18. Maybe there's another root cause hiding. I'll trawl through more dumps.

@zadjii-msft commented on GitHub (May 24, 2023): `BucketDetails?BucketIdentifier=48cb60da-2fa6-8c80-e52b-443845718ba0` seems to have... two different failures in it? * The first was from a test machine, so I'm not sure how real that is * `Failure?FailureSearchText=99935d8e-2b64-88fd-6c7d-2215bf2e8270` is `FAIL_FAST_FATAL_APP_EXIT_c0000409_TerminalApp.dll!winrt::Windows::Foundation::IUnknown::try_as_winrt::Microsoft::Terminal::Control::TermControl_` * There's only a couple cabs here... maybe not enough to work with? * Filed as MSFT:44764490 Looks like the crash is attributed to L959 here: https://github.com/microsoft/terminal/blob/c589784b54d46187289651fa6c04c49fe05826aa/src/cascadia/TerminalApp/TerminalTab.cpp#L953-L965 Do you happen to have [`focusFollowMouse`](https://learn.microsoft.com/en-us/windows/terminal/customize-settings/interaction#automatically-focus-pane-on-mouse-hover) enabled? I suppose just looking at that code, we're taking the parameter by reference, which is bad for a coroutine. I don't really think this should have regressed in 1.18. Maybe there's another root cause hiding. I'll trawl through more dumps.
claunia commented 2026-01-31 06:58:02 +00:00
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@pol73 commented on GitHub (May 24, 2023):

You right.
For "focusFollowMouse" was by set value to "true".
With set to "false" error does not replicable.

@pol73 commented on GitHub (May 24, 2023): You right. For "focusFollowMouse" was by set value to "true". With set to "false" error does not replicable.
claunia commented 2026-01-31 06:58:03 +00:00
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@zadjii-msft commented on GitHub (May 24, 2023):

Well that's really helpful! If turning that off fixes this, then surely that must be the real source of this bug. That's something we can fix easily enough.

@zadjii-msft commented on GitHub (May 24, 2023): Well that's really helpful! If turning that off fixes this, then surely that must be the real source of this bug. That's something we can fix easily enough.
claunia commented 2026-01-31 06:58:03 +00:00
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@zadjii-msft commented on GitHub (May 24, 2023):

huh, does "focusFollowMouse": true, even work at ALL in 1.17? I don't think it does 😐

@zadjii-msft commented on GitHub (May 24, 2023): huh, does ```"focusFollowMouse": true,``` even work at ALL in 1.17? I don't think it does 😐
claunia commented 2026-01-31 06:58:03 +00:00
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@lhecker commented on GitHub (May 25, 2023):

@dovholuknf Let's continue talking over here if you don't mind. I'm sorry that we broke your feature. As far as we can tell, it was already broken in 1.17 and we honestly don't know how it worked to begin with. It might've been a compiler update that broke it? It's definitely very weird.

Edit: Nevermind, I completely missed that Dustin released 1.17 stable yesterday: https://github.com/microsoft/terminal/releases/tag/v1.17.11391.0
If you use the non-Preview Windows Terminal now, you'll get 1.17. You can even opt into using AtlasEngine if you need the >60 FPS.

@lhecker commented on GitHub (May 25, 2023): @dovholuknf Let's continue talking over here if you don't mind. I'm sorry that we broke your feature. As far as we can tell, it was already broken in 1.17 and we honestly don't know how it worked to begin with. It might've been a compiler update that broke it? It's definitely very weird. **Edit:** Nevermind, I completely missed that Dustin released 1.17 stable yesterday: https://github.com/microsoft/terminal/releases/tag/v1.17.11391.0 If you use the non-Preview Windows Terminal now, you'll get 1.17. You can even opt into using AtlasEngine if you need the >60 FPS.
claunia commented 2026-01-31 06:58:03 +00:00
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@dovholuknf commented on GitHub (May 25, 2023):

I was already here reading this issue. I can wait a week, i'll survive as long as it's getting fixed with haste. :) My store has app updates on, but for some reason my 'old terminal' is 1.16 (Version: 1.16.10262.0) and not 1.17... Is there a third install of terminal I don't know about?

@dovholuknf commented on GitHub (May 25, 2023): I was already here reading this issue. I can wait a week, i'll survive as long as it's getting fixed with haste. :) My store has app updates on, but for some reason my 'old terminal' is 1.16 (Version: 1.16.10262.0) and not 1.17... Is there a third install of terminal I don't know about?
claunia commented 2026-01-31 06:58:04 +00:00
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@lhecker commented on GitHub (May 25, 2023):

Our GitHub releases are being released independently of the store releases, because those are still sort of "manual" unfortunately, whereas GitHub releases are mostly automated. But they use the exact same .msixbundle, so it doesn't really matter which one you install. You can get 1.17 stable here: https://github.com/microsoft/terminal/releases/tag/v1.17.11391.0

@lhecker commented on GitHub (May 25, 2023): Our GitHub releases are being released independently of the store releases, because those are still sort of "manual" unfortunately, whereas GitHub releases are mostly automated. But they use the exact same .msixbundle, so it doesn't really matter which one you install. You can get 1.17 stable here: https://github.com/microsoft/terminal/releases/tag/v1.17.11391.0
claunia commented 2026-01-31 06:58:04 +00:00
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@dovholuknf commented on GitHub (May 25, 2023):

focusFollowMouse crashes 1.17 too fwiw... i guess I'll just live with 1.18 and focusFollowMouse = false

@dovholuknf commented on GitHub (May 25, 2023): focusFollowMouse crashes 1.17 too fwiw... i guess I'll just live with 1.18 and focusFollowMouse = false
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Reference: starred/terminal#19937
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