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Fixed in 2017.3.0f3

Fixed in 2017.1.X, 2017.2.X



Found in


Issue ID




Unity crashes when debugging using .NET 4.6



Steps to reproduce:
1. Download project and open
2. Set up a breakpoint in GrowingState.cs at line 30
3. Attach to Unity and press play
4. Press one of the white squares wait a bit and repeat this step two more times
5. When breakpoint triggers step into it

Results: editor crashes when stepping into line 31. Doesn't reproduce when using .NET 3.5

Note: .NET 4.6 was introduced in 2017.1, 2017.2

Reproduced with: 2017.3.0a7 2017.2.0b2, 2017.1.0f3

  1. Resolution Note (fix version 2017.3.0f3):

    Fix tested with:
    Visual Studio tools for Unity -
    Visual Studio 2017 Version 15.9.4

Comments (24)

  1. shubhamswaraj2021

    Aug 18, 2020 16:51

    good one <a href="">lyricsauto</a>

  2. Pnvanol

    Jun 25, 2019 15:44

    still broken in 2019.1

  3. KevinDEX

    Jan 29, 2019 15:50

    KYUNGSUNGCHO - deleting all my watches worked as well

  4. KyungSungCho

    Jan 06, 2019 08:39

    I had the same problem.
    So I deleted all the items from the Visual Studio Watch Window Debugger. So my problem was solved.
    Perhaps my problem was running GetComponentInChildren() in the watch window.

  5. radix_greg_presland

    Sep 20, 2018 15:36

    Continuing to happen in Unity 2018.2.8f1 with Visual Studio extension _Visual Studio 2017 Tools for Unity_ ver

  6. cgrow67

    Sep 17, 2018 20:40

    This isn't resolved at all.
    Happens to me in 15.4 all the time.

  7. rfgsoftware

    Sep 09, 2018 10:16

    I have the latest version of Visual studio for Mac and Unity 2018.2.6f1 . I have checked and no update are required on Visual Studio. When I try to attach the debugger, Unity crashes.

  8. amcakebread

    Aug 16, 2018 11:08

    still completely broken on Unity 2018.2.1f1 and VS 15.7.5

    VS freezes and debugging is more or less completely impossible

    I am beginning to think developing using Unity is a big mistake

  9. guneyozsan

    Jul 28, 2018 23:36

    I still have this on 2018.2.0f2 and 2018.2.1.f1 with Visual Studio 15.7.5.

  10. olesa79

    Jul 05, 2018 14:26

    I just had this problem with VS 15.7.4 (with tools for unity and unity 2018.1.6f1.
    After doing a little testing, I could only reproduce the problem in one class that implements IDropHandler and another that implements IBeginDragHandler/IDragHandler/IEndDragHandler.
    Unity breaks and the breakpoint highlights in VS as expected, but Unity crashes immediately.
    In other classes (I only tested 3-4), debugging works just fine.

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