Meaningful exception message needed from failed expression evaluation

[andrew-vdb]

var session = Create(fsiExePath);
var option = session.EvalExpression(script);

An exception of type 'System.Exception' occurred in FSharp.Compiler.Service.dll but was not handled in user code

{"Evaluation failed"}

This exception message is meaningless and we need to be able to diagnose what is wrong with the script instead of receiving message "Evaluation failed"

[7sharp9]

Errors would be sent to the output writer.

[andrew-vdb]

That should be the case if my script write the error manually to the output

[dsyme]

Fixed by #475. When the new nuget is published please use session.EvalExpressionNonThrowing(script)