Omnisharp-roslyn: net451 version crashes in Emacs

[k-ode]

If I try to run the net451 version in Emacs on Windows 10, Emacs just crashes. The netcoreapp version however works fine. It's not related to omnisharp-emacs since just running (start-process "foo" "*foo*" "OmniSharp") causes a crash.

There are also several reports on different Windows configurations here: https://github.com/OmniSharp/omnisharp-emacs/issues/178

I've also tried this on the latest Emacs version (25.1) as well as an older one (24.4), with the same result.

[willl]

Hi @kimgronqvist, omnisharp-Roslyn was recently migrated to .NET 4.6, could you please re-test and see if that works better?

[k-ode]

Sadly, no. This bug still persists with the latest version.

[JosephFerano]

Confirming this bug as well. Using emacs 25.2 with net451 v1.15.0
I'm trying to use omnisharp with Unity. From what I understand, I need to use net451; can't really use dotnetcore, so hopefully this can get fixed soon cause if not I can't use emacs with omnisharp for Unity.

[JosephFerano]

I just tested on emacs 25.2 with the 64bit version of O# net46 v.1.16.0, and it's still crashing. However, 32bit seems to be working fine!

However, I got these errors;
OmniSharp server error: The project system ’OmniSharp.MSBuild.MSBuildProjectSystem’ threw exception during initialization. When I try to call go-to-definition, I get this warning; Cannot go to definition as none was returned by the API. Which I figure has to do with the exception.

Going to investigate further.

[razzmatazz]

Emacs bug has been reported in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=27527 and should be fixed in the next emacs version.

In the meantime -x86- (NOT -x64-) omnisharp-roslyn bundle should be used instead, 32bit server exe doesn't crash for me.

[razzmatazz]

omnisharp-emacs now has the M-x omnisharp-install-server command that will properly setup the server for you automatically (see https://github.com/OmniSharp/omnisharp-emacs/issues/275).

It will also avoid 64bit binary on windows and will use 32bit one for now (until emacs-26 is released and detected). I think this issue can be closed then

[filipw]

I will close this as this is tracked in https://github.com/OmniSharp/omnisharp-emacs/issues/275, for any other Emacs issue, please open them in https://github.com/OmniSharp/omnisharp-emacs repo.