\ character in directory name prevents compilation

[AdamSlayer]

Description

Command dotnet run fails with an internal stack overflow error when there is a folder named \ present in the project root. It seems like it encounters an infinite recursion.

Reproduction Steps

1. Use a Unix-based system that allows a directory to be named \
2. Create a new empty c# project (you can use dotnet new)
3. Create a new folder named \ (you can use mkdir \\
4. Run dotnet run, it will fail on stack overflow likely due to infinite recursion.

Expected behavior

dotnet run builds and runs the project

Actual behavior

dotnet run fails on stack overflow due to infinite recursion. Dotnet 8 shows no stack trace, just says stack overflow. Below is stack trace from dotnet 6.0.0, shortened because it was very long.

mkdir \\
dotnet run
Stack overflow.
   at Microsoft.Build.Shared.FileMatcher+<>c__DisplayClass19_0.<.ctor>b__0(FileSystemEntity, System.String, System.String, System.String, Boolean)
   at Microsoft.Build.Shared.FileMatcher.GetFilesRecursive(System.Collections.Concurrent.ConcurrentStack`1<System.Collections.Generic.List`1<System.String>>, RecursionState, System.String, Boolean, System.Collections.Generic.IList`1<RecursionState>, System.Collections.Generic.Dictionary`2<System.String,System.Collections.Generic.List`1<RecursionState>>, TaskOptions)
   at Microsoft.Build.Shared.FileMatcher+<>c__DisplayClass41_0.<GetFilesRecursive>b__0(System.String)
   at Microsoft.Build.Shared.FileMatcher.GetFilesRecursive(System.Collections.Concurrent.ConcurrentStack`1<System.Collections.Generic.List`1<System.String>>, RecursionState, System.String, Boolean, System.Collections.Generic.IList`1<RecursionState>, System.Collections.Generic.Dictionary`2<System.String,System.Collections.Generic.List`1<RecursionState>>, TaskOptions)
   at Microsoft.Build.Shared.FileMatcher+<>c__DisplayClass19_0.<.ctor>b__0(FileSystemEntity, System.String, System.String, System.String, Boolean)
   at Microsoft.Build.Shared.FileMatcher.GetFilesRecursive(System.Collections.Concurrent.ConcurrentStack`1<System.Collections.Generic.List`1<System.String>>, RecursionState, System.String, Boolean, System.Collections.Generic.IList`1<RecursionState>, System.Collections.Generic.Dictionary`2<System.String,System.Collections.Generic.List`1<RecursionState>>, TaskOptions)
   at Microsoft.Build.Shared.FileMatcher+<>c__DisplayClass41_0.<GetFilesRecursive>b__0(System.String)
   at Microsoft.Build.Shared.FileMatcher.GetFilesRecursive(System.Collections.Concurrent.ConcurrentStack`1<System.Collections.Generic.List`1<System.String>>, RecursionState, System.String, Boolean, System.Collections.Generic.IList`1<RecursionState>, System.Collections.Generic.Dictionary`2<System.String,System.Collections.Generic.List`1<RecursionState>>, TaskOptions)


... a lot more recursion ...
  
Microsoft.Build.Shared.FileMatcher.GetFilesRecursive(System.Collections.Concurrent.ConcurrentStack`1<System.Collections.Generic.List`1<System.String>>, RecursionState, System.String, Boolean, System.Collections.Generic.IList`1<RecursionState>, System.Collections.Generic.Dictionary`2<System.String,System.Collections.Generic.List`1<RecursionState>>, TaskOptions)
   at Microsoft.Build.Shared.FileMatcher+<>c__DisplayClass41_0.<GetFilesRecursive>b__0(System.String)
   at Microsoft.Build.Shared.FileMatcher.GetFilesRecursive(System.Collections.Concurrent.ConcurrentStack`1<System.Collections.Generic.List`1<System.String>>, RecursionState, System.String, Boolean, System.Collections.Generic.IList`1<RecursionState>, System.Collections.Generic.Dictionary`2<System.String,System.Collections.Generic.List`1<RecursionState>>, TaskOptions)
   at Microsoft.Build.Shared.FileMatcher+<>c__DisplayClass41_0.<GetFilesRecursive>b__0(System.String)
   at System.Threading.Tasks.Parallel+<>c__DisplayClass32_0`2[[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].<ForEachWorker>b__0(Int32)
   at System.Threading.Tasks.Parallel+<>c__DisplayClass19_0`1[[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].<ForWorker>b__1(System.Threading.Tasks.RangeWorker ByRef, Int32, Boolean ByRef)
   at System.Threading.Tasks.TaskReplicator+Replica.Execute()
   at System.Threading.Tasks.TaskReplicator+Replica+<>c.<.ctor>b__4_0(System.Object)
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task+<>c.<.cctor>b__272_0(System.Object)
   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(System.Threading.Thread, System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef, System.Threading.Thread)
   at System.Threading.Tasks.Task.ExecuteEntryUnsafe(System.Threading.Thread)
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading.PortableThreadPool+WorkerThread.WorkerThreadStart()
   at System.Threading.Thread.StartCallback()
zsh: abort      dotnet run

Regression?

No response

Known Workarounds

1. Don't create a folder named \
2. Use Windows or another non-Unix-based OS (not recommended, windows is bad)

Configuration

dotnet 8.0.x fails, dotnet 6.0.0 fails, not tested for other versions.
MacOS Sonoma 14.4, M3 chip, architecture aarch64

Other information

No response

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