Bug 51407 - Evaluator stuck in infinite loop when getting completions for "typeof(System.Console."
Summary: Evaluator stuck in infinite loop when getting completions for "typeof(System....
Status: NEW
Alias: None
Product: Compilers
Classification: Mono
Component: C# (show other bugs)
Version: unspecified
Hardware: PC Mac OS
: --- normal
Target Milestone: ---
Assignee: Marek Safar
URL:
Depends on:
Blocks:
 
Reported: 2017-01-11 13:24 UTC by Alexander Köplinger [MSFT]
Modified: 2017-01-11 13:24 UTC (History)
1 user (show)

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

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Related Links:
Status:
NEW

Description Alexander Köplinger [MSFT] 2017-01-11 13:24:32 UTC
Repro:

> using System;
> using Mono.CSharp;
> 
> namespace TestConsole
> {
> 	class MainClass
> 	{
> 		public static void Main(string[] args)
> 		{
> 			Console.WriteLine("Hello World!");
> 
> 			var settings = new CompilerSettings();
> 			var printer = new ConsoleReportPrinter();
> 			var eval = new Evaluator(new CompilerContext(settings, printer));
> 
> 			eval.DescribeTypeExpressions = true;
> 			eval.WaitOnTask = true;
> 
> 			string prefix = null;
> 			string complete = "typeof(System.Console.";
> 			string[] completions = eval.GetCompletions(complete, out prefix);
> 			Console.WriteLine(String.Join(Environment.NewLine, completions));
> 		}
> 	}
> }

Compile and run:

> $ mcs Program.cs /r:Mono.CSharp.dll

> $ mono Program.exe
>   Hello World!

After that the program is stuck. This was extracted from the "csharp" tool source where this problem was noticed first.