[LibraryImport] throws NotImplementedException on ref readonly parameters #97706
Description
Description
I am P/Invoking into a method taking a const T* parameter. Historically, this would be typed in the import as a plain T* or an in T. I wanted to use ref readonly to require the "ref" from the caller, so I used ref readonly. However, this causes the source generator to completely fail and generate nothing. If ref readonly is not supported, then it should generate an error, not crash.
Reproduction Steps
[LibraryImport(LIBC, EntryPoint = "cfgetospeed")]
public static partial uint CFGetOutputSpeed(ref readonly TermIOs termios_p);Expected behavior
An implementation being generated, or at least an error message about unsupported parameter types.
Actual behavior
The source generator throws an exception and generates nothing.
4>CSC: Warning CS8785 : Generator 'LibraryImportGenerator' failed to generate source. It will not contribute to the output and compilation errors may occur as a result. Exception was of type 'NotImplementedException' with message 'Support for some RefKind'.
Regression?
No response
Known Workarounds
Don't use ref readonly, but just ref or in
Configuration
.NET SDK:
Version: 8.0.101
Commit: 6eceda187b
Workload version: 8.0.100-manifests.30fce108
Runtime Environment:
OS Name: Windows
OS Version: 10.0.22631
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\8.0.101\
.NET workloads installed:
Workload version: 8.0.100-manifests.30fce108
There are no installed workloads to display.
Host:
Version: 8.0.1
Architecture: x64
Commit: bf5e279d92
.NET SDKs installed:
8.0.101 [C:\Program Files\dotnet\sdk]
.NET runtimes installed:
Microsoft.AspNetCore.App 8.0.1 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.15 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.26 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.15 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]
Environment variables:
Not set
global.json file:
C:\Users\<>\global.json
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Other information
No response