[Mono-bugs] [Bug 651296] New: Calling Environment.Exit only kills the calling thread, not the main thread

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Thu Nov 4 09:47:39 EDT 2010



           Summary: Calling Environment.Exit only kills the calling
                    thread, not the main thread
    Classification: Mono
           Product: Mono: Runtime
           Version: 2.8.x
          Platform: x86
        OS/Version: Windows 7
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: misc
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: imphasing at gmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US)
AppleWebKit/534.7 (KHTML, like Gecko) Chrome/7.0.517.41 Safari/534.7

Calling Environment.Exit from a second thread kills that thread, but not the
main thread, leading to somewhat strange results.

Test case:

using System;
using System.Threading;

class ThreadTest
    public static void Main()
        ConsoleKeyInfo cki;
        Thread second = new Thread(new ThreadStart(SecondThread));

        Console.WriteLine("[Thread1] Thread ID: " +

        Console.WriteLine("[Thread1] Second thread started. Should be exiting
any second...");

            Console.WriteLine("[Thread1] Looping on readkey... press 'X' to
            Console.WriteLine("[Thread1] Has shutdown started? " +
            cki = Console.ReadKey(true);
            if (cki.Key == ConsoleKey.X)

    public static void SecondThread()
        Console.WriteLine("[Thread2] Thread ID: " +
        Console.WriteLine("[Thread2] Calling Environment.Exit...");

I can confirm that this works as expected on MS's CLR, as well as on Linux
using 2.6.7 and 2.8, so this bug seems to be Windows-specific.

Reproducible: Always

Steps to Reproduce:
1. Run the program
2. Note that it kills off the second thread, but not the main thread, as it
continues to accept input

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