Unable to execute any binary built for NetCore5.0 with previews 6 or later

[pgrawehr]

See dotnet/iot#1099 for a lot of extra information and how to reproduce.

Basically, every attempt to run an application with dotnet 5.0 preview 6 or later on my Raspberry Pi (ARM32), results in this error:

Failed to create CoreCLR, HRESULT: 0x80070057

This seems to be irrespective on where the application was built (even if built with the very same SDK on the Pi itself). The preview 4-version works fine.

I'm trying to investigate the cause, but building the SDK fails on the Pi:

pi@raspberrypi:~/projects/sdk $ ./build.sh
... many messages, ending with:
dotnet-install: Downloading link: https://dotnetcli.azureedge.net/dotnet/Runtime/1.0.5/dotnet-runtime-1.0.5-linux-arm.tar.gz
curl: (22) The requested URL returned error: 404 
dotnet-install: Cannot download: https://dotnetcli.azureedge.net/dotnet/Runtime/1.0.5/dotnet-runtime-1.0.5-linux-arm.tar.gz
dotnet_install: Error: Could not find/download: `.NET Core Runtime` with version = 1.0.5
dotnet_install: Error: Refer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support
pi@raspberrypi:~/projects/sdk $ 

[pgrawehr]

The .NET Core Runtime Version 1.0.5 was never released for ARM32, it seems. So there's something fishy here.

[pgrawehr]

Closing this here, as the original problem has been resolved. I'll prepare a PR on improving the docs on how to build for arm32, though.