LinqPad 8 macOS LINQPad.ExecutionModel.ProcessCreationException

Xander · June 26

Hello, not sure if this is the right place to ask for help, but here it goes:

When running LinqPad 8 on macOS 26, I am not able to execute any script or add Entity Framework Core (multi-provider) as a data context type. This is the error I am getting when I try to run a script or add the above data context:

LINQPad.ExecutionModel.ProcessCreationException
Server process did not start.
SP=0 SC=False SW=5000 ST=5044 PT=170 MC=1 TC=17 PM=0

Typing in the editor works well, autocomplete works fine too. I have both .NET 8 and 9 SKDs installed. I tried to run the LinqPad 9 preview today and that one worked fine.

Any clues what might be going on?

Thanks

JoeAlbahari · June 27

It's likely due to bugs in macOS's implementation of the Posix semaphore. LINQPad 9 doesn't use the semaphore, which will be why it works. I'll patch LINQPad 8 with the same workaround soon.

Xander · June 27

Thank you! I’ll wait for it 😀

JoeAlbahari · June 28

A LINQPad 8 for macOS update has now been released to fix this issue. Let me know how you get on.

Xander · June 29

Thanks! You fixed it!

LinqPad 8 macOS LINQPad.ExecutionModel.ProcessCreationException

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