Description

The following code snippet consequently fails with System.EntryPointNotFoundException if executed using configuration Release:

while (true)
{
    var values = new[] { DayOfWeek.Saturday }.Cast<int>();
    foreach (var value in values) 
    {
    }
}

Reproduction Steps

while (true)
{
    var values = new[] { DayOfWeek.Saturday }.Cast<int>();
    foreach (var value in values) 
    {
    }
}

save this 👆 into a file and run it using dotnet run --configuration release .

Expected behavior

The code snippet runs forever without an exception.

Actual behavior

After 5000 iterations of the while loop the following exception is thrown:

Unhandled exception. System.EntryPointNotFoundException: Entry point was not found.
   at System.Collections.Generic.IEnumerator`1.get_Current()
   at Program.<Main>$(String[] args) in C:\projects\scratch\enum10\Program.cs:line 4

Regression?

It works with TFM net8.0.
It works with TFM net9.0.

Known Workarounds

Not using Cast<int> solves the problem.

Configuration

• .NET 10.0.100-rc.1.25451.107
• OS Windows 11
• x64
• the problem occurs only with configuration Release

Other information

No response