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  1. Minecraft Launcher
  2. MCL-17220

Launcher hard crashes when using a custom Java installation with modded instances


    • Confirmed


      Over on the Fabric (Users of optifine and forge seem to experience the same issue as well) discord we have been getting a number of reports of the latest vanilla launcher crashing with fabric.

      This seems to be the case on windows and mac when using a custom java version with modded instances such as fabric. As far as im aware no one has been able to reproduce this with vanilla.

      In my testing I am able to stall the launcher on windows, and hard crash it on MacOS. In all cases there doesnt appear to be anything useful in the log files. (MacOS provided a thread dump) You can see the issue that was raised on our issue tracker here: https://github.com/FabricMC/fabric-loader/issues/399

      I have attached logs from our users who are based on windows, and included a thread dump that MacOS provided. 


      Please let me know if you require anymore information, I will do my best to help resolve this issue.


      Many Thanks

        1. fabric-loader-0.11.2-1.16.5.json
          1 kB
        2. image-2021-03-10-17-01-53-425.png
          261 kB
        3. macos_thread_dump.txt
          132 kB
        4. New Paste 1.txt
          33 kB
        5. vun8Hkik.txt
          38 kB

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            modmuss50 modmuss50
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