Bug 13684 - When setting OutputAssembly on CompilerParameters, failing to end the string with ".dll" results in exception
Summary: When setting OutputAssembly on CompilerParameters, failing to end the string ...
Alias: None
Product: Class Libraries
Classification: Mono
Component: System ()
Version: 2.10.x
Hardware: PC Linux
: --- normal
Target Milestone: Untriaged
Assignee: Marek Safar
Depends on:
Reported: 2013-08-01 12:46 UTC by Eric Lawrence
Modified: 2013-08-07 15:57 UTC (History)
2 users (show)

Is this bug a regression?: ---
Last known good build:

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Description Eric Lawrence 2013-08-01 12:46:52 UTC

If you set the CompilerParameter's OutputAssembly="SomeNameWithoutDLL" you hit the exception:

Compiler error
  at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModule (System.String name, System.String fileName, Boolean emitSymbolInfo, Boolean transient) [0x00000] in <filename unknown>:0 

On the other hand, if you use OutputAssembly="SomeNameWithDLL.dll" the DLL works fine.

using System;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
using System.Reflection;
using System.Windows.Forms;

namespace Fiddler
    public class CSharpScript

        public CSharpScript()
                var oCSC = new CSharpCodeProvider();
                if (null == oCSC) MessageBox.Show("Can't get compiler...");
                CompilerParameters cp = new CompilerParameters();
                cp.GenerateExecutable = false;
                cp.GenerateInMemory = true;
                cp.OutputAssembly = "FiddlerCSharpScript.dll";  // <---- ERROR LINE
                string sSource = "using System;\nusing Fiddler;\npublic static class Handlers {\npublic static void Main() { FiddlerApplication.Log.LogString(\"Hello World.\" + Environment.StackTrace); } }";
                MessageBox.Show(sSource, "Source");
                CompilerResults oCR = oCSC.CompileAssemblyFromSource(cp, sSource);

                if (oCR.Errors.Count > 0)
                    MessageBox.Show(oCR.Errors[0].ErrorText, "Compiler error"); 
               if (oCR == null) MessageBox.Show("Failed compile");
                Type T = oCR.CompiledAssembly.GetType("Handlers");
                if (null == T) MessageBox.Show("Couldn't find main type...");
               MethodInfo methodinfo = T.GetMethod("Main");
                if (methodinfo == null) MessageBox.Show("Failed to find mehtod");

                methodinfo.Invoke(null, null);
            catch (Exception eX)
                MessageBox.Show(Utilities.DescribeException(eX) + eX.StackTrace, "Failed to compile");
Comment 1 Marek Safar 2013-08-07 15:57:35 UTC
I cannot reproduce the issue with Mono 3.2