dotnet 3.1.301 on Fedora 32 unable to find /usr/share/dotnet/packs/Microsoft.NETCore.App.Ref/3.1.0/data/FrameworkList.xml because it doesn't exist

[FilBot3]

I created a GitHub Gist with the output of the commands I used to remove and install dotnet-sdk-3.1 then create a single C# app using the dotnet command.

• https://gist.github.com/FilBot3/724bec9e94c2e0d7e9f0b8d5f092d395

Here is some up-front information about my system and dotnet on it.

➜  dotnet-core-sample dotnet --list-sdks
3.1.301 [/usr/share/dotnet/sdk]
➜  dotnet-core-sample dotnet --version
3.1.301
➜  dotnet-core-sample uname -a
Linux localhost.localdomain 5.6.18-300.fc32.x86_64 #1 SMP Wed Jun 10 21:38:25 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
➜  dotnet-core-sample cat /etc/os-release 
NAME=Fedora
VERSION="32 (Thirty Two)"
ID=fedora
VERSION_ID=32
VERSION_CODENAME=""
PLATFORM_ID="platform:f32"
PRETTY_NAME="Fedora 32 (Thirty Two)"
ANSI_COLOR="0;34"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora:32"
HOME_URL="https://fedoraproject.org/"
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f32/system-administrators-guide/"
SUPPORT_URL="https://fedoraproject.org/wiki/Communicating_and_getting_help"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=32
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=32
PRIVACY_POLICY_URL="https://fedoraproject.org/wiki/Legal:PrivacyPolicy"

[FilBot3]

Seems that this is also affecting OmniSharp Roslyn as well making it so it can't load the sln file or the csproj files.

[dagood]

Thanks for the extensive logs. It looks like you have a mixed set of Microsoft-built and Fedora 32 .NET packages--the fc32 indicates the first group is Fedora distro packages:

aspnetcore-targeting-pack-3.1-3.1.3-1.fc32.x86_64   
dotnet-targeting-pack-3.1-3.1.3-1.fc32.x86_64       
netstandard-targeting-pack-2.1-3.1.103-1.fc32.x86_64

aspnetcore-runtime-3.1-3.1.5-1.x86_64               
dotnet-apphost-pack-3.1-3.1.5-1.x86_64              
dotnet-host-3.1.5-1.x86_64                          
dotnet-hostfxr-3.1-3.1.5-1.x86_64                   
dotnet-runtime-3.1-3.1.5-1.x86_64                   
dotnet-runtime-deps-3.1-3.1.5-1.x86_64              
dotnet-sdk-3.1-3.1.301-1.x86_64                     

These install to different locations, so while dotnet is installed in /usr/share/dotnet/, the targeting pack was installed to /usr/lib64/dotnet/. This is why the build can't find them. (There are other differences, but this is the one that bit.)

Here's an earlier instance of the problem: dotnet/core#4605 (comment)

I would suggest using either the Microsoft packages for .NET Core, or the Fedora packages for .NET Core. Mixing them is probably not a safe thing to do.

I think the easiest way to stop mixing is to remove the Microsoft package repo (I believe that's rm /etc/yum.repos.d/microsoft-prod.repo to reverse the instructions) and reinstall again, to get them from the Fedora 32 distro.

---

We have dotnet/docs#18347 tracking getting our documentation in shape to handle this, since it'll probably be a somewhat common issue as people move onto the distro packages, in particular after running a distro upgrade from Fedora 31 => Fedora 32 if the Microsoft feed tags along. 😕

/cc @omajid @NikolaMilosavljevic @dleeapho @MichaelSimons

[FilBot3]

Disabling the repository using:

sudo dnf config-manager --set-disabled packages-microsoft-com-prod

Then uninstalling the binaries and reinstalling with the F32 provided packages did the trick. Thank you very much.