Repro steps:

• Clone https://github.com/pranavkm/ReadyToRunBug
• Publish with "Enable ReadyToRun compilation". Here's the VS settings I used:
  
• Run the published output

Stack trace:

Unhandled exception. System.TypeLoadException: Could not load type 'c1.Test_Æoå' from assembly 'c1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
   at System.Reflection.CustomAttribute._CreateCaObject(RuntimeModule pModule, RuntimeType type, IRuntimeMethodInfo pCtor, Byte** ppBlob, Byte* pEndBlob, Int32* pcNamedArgs)
   at System.Reflection.CustomAttribute.CreateCaObject(RuntimeModule module, RuntimeType type, IRuntimeMethodInfo ctor, IntPtr& blob, IntPtr blobEnd, Int32& namedArgs)
   at System.Reflection.CustomAttribute.AddCustomAttributes(ListBuilder`1& attributes, RuntimeModule decoratedModule, Int32 decoratedMetadataToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, ListBuilder`1 derivedAttributes)
   at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType)
   at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType)
   at System.Reflection.RuntimeAssembly.GetCustomAttributes(Type attributeType, Boolean inherit)
   at System.Attribute.GetCustomAttributes(Assembly element, Boolean inherit)
   at System.Reflection.CustomAttributeExtensions.GetCustomAttributes(Assembly element)

Original report

This issue has been moved from a ticket on Developer Community.

[severity:I'm unable to use this version] [regression] [worked-in:16 (asp.net 5)]
This worked in asp.net 5 - now broken in asp.net 6.
I have a website where I use danish letters for many things, including file names, classes and variables. Since .net and Windows is all unicode, this has worked fine till now.

I have now installed Visual Studio 2022 and .net 6. I have converted my projects to target .net6.0-windows
When I compile and run (with or without Visual Studio) on the local IIS, everything is fine. When I publish to IIS, the app won't even start (this is true no matter if I run the published app on local IIS or remote IIS).

I have found out 2 conditions must be true:

1. 'enable ready to run compilation' publish setting must be checked.
2. The site must contain a page with a unicode (non-ascii) name.

This is serious, since I use danish letters all over the place and finding this bug has taken days.
I think you have changed the 'readytorun' compiler to support Linux (and Linux can't even spell unicode).
I would like to be able to use the 'enable ready to run compilation' setting again.

Reproducing this is quite easy:

1. In any WebApplication running .net 6.0 in Visual Studio 2022, add a Razor page with a name like: 'Æøå.cshtml'.
2. Compile and run - this should work.
3. Publish the application to IIS. Make sure have checked 'enable ready to run compilation'.

I have attached my other publish settings (in case that matters).

Now the app won't even start!

I hope you get this fixed quickly so the whole world can use 'readytorun' compilation.

Original Comments

live on 11/16/2021, 10:40 PM:

Oops, wrong screen shot, ‘readytorun’ should of course be checked.

Feedback Bot on 11/17/2021, 00:15 AM:

We have directed your feedback to the appropriate engineering team for further evaluation. The team will review the feedback and notify you about the next steps.

Feedback Bot on 11/18/2021, 00:20 AM:

Thank you for sharing your feedback! Our teams prioritize action on product issues with broad customer impact. See details at: https://docs.microsoft.com/en-us/visualstudio/ide/report-a-problem?view=vs-2019#faq. In case you need answers to common questions or need assisted support, be sure to use https://visualstudio.microsoft.com/vs/support/. We’ll keep you posted on any updates to this feedback.

Original Solutions

(no solutions)