[Mono-bugs] [Bug 353182] New: Crash when refer to Dictionary after load a file to buffer

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=353182


           Summary: Crash when refer to Dictionary after load a file to
                    buffer
           Product: Mono: Class Libraries
           Version: 1.2.6
          Platform: Sparc
        OS/Version: Solaris 8
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: System
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: Yasuaki.Hasegawa at fujixerox.co.jp
         QAContact: mono-bugs at lists.ximian.com
                CC: Yasuaki.Hasegawa at fujixerox.co.jp
          Found By: Customer


Description of Problem:

Steps to reproduce the problem:
1. create a C# source file with following contents.

bash-2.03$ cat test4.cs
using System;
using System.Collections.Generic;
using System.IO;

public class Example
{
        public static void Main(string[] args) {
                // following statement will generate an nonsignificant
                // warning: "The variable data is assigned but its value 
                // is never used"

                byte[] data = File.ReadAllBytes(@"/etc/passwd"); // any
readable file

                Dictionary<char, byte> _widths = new Dictionary<char, byte>();

                _widths[(char)0] = (byte)0;
        }
}

2. compile it and run.

bash-2.03$ /opt/csw/bin/gmcs test4.cs
test4.cs(12,24): warning CS0219: The variable `data' is assigned but its value
is never used
Compilation succeeded - 1 warning(s)
bash-2.03$ /opt/csw/bin/mono test4.exe

Actual Results:
The application crashed with the following stack trace:

test4.cs(12,24): warning CS0219: The variable `data' is assigned but its value
is never used
Compilation succeeded - 1 warning(s)
bash-2.03$ /opt/csw/bin/mono test4.exe

Unhandled Exception: System.NullReferenceException: Object reference not set to
an instance of an object
  at
System.Collections.Generic.GenericEqualityComparer`1[System.Char].GetHashCode
(Char ) [0x00000]
  at System.Collections.Generic.Dictionary`2[System.Char,System.Byte].set_Item
(Char , Byte ) [0x00000]
  at Example.Main (System.String[] args) [0x00000]

Expected Results:
The program shouldn't crash.

How often does this happen? 
infallible

Additional Information:
(1) Build Date & Platform

bash-2.03$ uname -a
SunOS tornado 5.8 Generic_117350-51 sun4u sparc SUNW,Sun-Blade-1000

bash-2.03$ /opt/csw/bin/gmcs --version
Mono C# compiler version 1.2.6.0

bash-2.03$ /opt/csw/bin/mono --version
Mono JIT compiler version 1.2.6 (tarball)
Copyright (C) 2002-2007 Novell, Inc and Contributors. www.mono-project.com
        TLS:           normal
        GC:            System Boehm (with typed GC)
        SIGSEGV:       normal
        Notification:  Thread + polling
        Architecture:  sparc
        Disabled:      none

(2) Related Product
This issue was reported in following topics.

MindTouch OpenGarden.org Forums > MindTouch Deki Wiki  > Deki Wiki Installation 
> Install on Solaris 8 -- 404 and NullReferenceException

http://forums.opengarden.org/showthread.php?t=1347

Thank you!


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