The CreateAppHost task should be more resilient to a folder presence condition and create a nicer error instead of a stack dump. #13920
Description
See: dotnet/msbuild#5705 (comment)
The underlying issue here is that the file system does not support xyz (with no extension) exist next to directory xyz. The reason this differs from windows is that linux executables have no extension, so the file-service executable that is getting generated is being placed next to the file-service directory.