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Fixed in 2018.1.X

Fixed in 5.6.X, 2017.1.X, 2017.2.X, 2017.3.X, 2017.4.X



Found in


Issue ID




"Assertion failed: TLS Allocator ALLOC_TEMP_THREAD..." error is shown after building the project for iOS'



To reproduce:

1. Create a new project
2. Build it for iOS
3. Observe the console after the build has finished

Expected: no assertion errors are shown after building the project for iOS

Reproduced in 5.6.0a2, 5.6.1p4, 2017.1.0b8, 2017.2.0a4
Did not reproduced in 5.5.4f1, 5.6.0a1
Regression introduced in 5.6.0a2
Not reproducible in 2017.3.0a3

Comments (130)

  1. cain06

    Jan 10, 2018 15:35

    2017.3 just to clarify

  2. cain06

    Jan 10, 2018 15:34

    I am also having this issue. Building for iOS but from a Windows PC, error shows up in the Console in Unity, but the build is successful anyways

  3. valentinwinkelmann

    Jan 08, 2018 18:33

    Same here, unity 2017.3.

    After building on Android i get this **** bug.
    Making a new Clean project dosn't work.

  4. MichalDev

    Jan 08, 2018 12:34

    For me also deleting everything except Assets, Project Settings and Soluction Files fixed the issue

  5. Zaedoux

    Jan 07, 2018 03:24

    I had this same issue in version 2017.2.0f3 and solved it by deleting everything from my project folder (in the explorer) EXCEPT:

    - Assets
    - ProjectSettings
    - Any Visual Studio Project/Solution Files

  6. Ludomade

    Jan 05, 2018 07:22

    Happening here on 2017.3.0p1

    Shame, really wanted to use the new crunch compression on Android.

  7. warren-miller-maltd

    Jan 01, 2018 09:32

    same problem in 2017.2.0f3

  8. RaventurnPatrick

    Dec 31, 2017 17:38

    Having this issue with 2017.3 (release) in the Editor when choosing the Android target. Also weird crashes on Android probably related to the new crunch compression features (not occuring with 2017.2 or before)

  9. Zaegun

    Dec 29, 2017 19:02

    Unity 2017.3.0f3 is giving me this error when I build for iOS.

    I made sure none of my textures are using Crunch compression as someone mentioned previously, but that doesn't appear to be working on my project. Clearing it does nothing as it'll pop up again and again until I restart the editor.

  10. Tx

    Dec 28, 2017 14:51

    Same issue for me. Unity 2017.3.0f3.
    Can't work anymore, last version hadn't any issue. Now all blew up.
    Thanks unity. :-(

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