Csc.exe crashes when compiling Roslyn with latest Roslyn [Help need]

[GVX111]

ArgumentException: The output byte buffer is too small to contain the encoded data, encoding 'Unicode (UTF-8)' fallback 'System.Text.EncoderReplacementFallback'.
Parameter name: bytes
ArgumentException: The output byte buffer is too small to contain the encoded data, encoding 'Unicode (UTF-8)' fallback 'System.Text.EncoderReplacementFallback'.
 Parameter name: bytes
System.Text.Encoding.ThrowBytesOverflow()
System.Text.Encoding.ThrowBytesOverflow(EncoderNLS encoder, Boolean nothingEncoded)
System.Text.UTF8Encoding.GetBytes(Char* chars, Int32 charCount, Byte* bytes, Int32 byteCount, EncoderNLS baseEncoder)
System.Text.EncoderNLS.GetBytes(Char[] chars, Int32 charIndex, Int32 charCount, Byte[] bytes, Int32 byteIndex, Boolean flush)
Microsoft.AspNet.Mvc.HttpResponseStreamWriter.FlushInternal(Boolean flushStream, Boolean flushEncoder)
Microsoft.AspNet.Mvc.HttpResponseStreamWriter.Dispose(Boolean disposing)
System.IO.TextWriter.Dispose()
Microsoft.AspNet.Mvc.ViewFeatures.ViewExecutor.d__14.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNet.Mvc.ViewResult.d__24.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.d__53.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.d__52.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.d__51.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.d__46.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.d__41.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNet.Mvc.Infrastructure.MvcRouteHandler.d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNet.Routing.Template.TemplateRoute.d__27.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
System.Runtime.CompilerServices.TaskAwaiter.GetResult()

Help Need

[jmarolf]

@GVX111 Can you post some info about how you are building roslyn? Is this from within Visual Studio?

[davkean]

This stack looks like MVC, if you are still having issues can you file this over on https://github.com/aspnet/mvc?