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<TITLE> [Mono-bugs] [Bug 476358] New: Compiler crash in a Linq expression containing a join clause in wrong order
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<H1>[Mono-bugs] [Bug 476358] New: Compiler crash in a Linq expression containing a join clause in wrong order</H1>
<B>bugzilla_noreply at novell.com</B>
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TITLE="[Mono-bugs] [Bug 476358] New: Compiler crash in a Linq expression containing a join clause in wrong order">bugzilla_noreply at novell.com
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<I>Tue Feb 17 02:51:15 EST 2009</I>
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<PRE><A HREF="https://bugzilla.novell.com/show_bug.cgi?id=476358">https://bugzilla.novell.com/show_bug.cgi?id=476358</A>
Summary: Compiler crash in a Linq expression containing a join
clause in wrong order
Classification: Mono
Product: Mono: Compilers
Version: SVN
Platform: PC
OS/Version: Ubuntu
Status: NEW
Severity: Normal
Priority: P5 - None
Component: C#
AssignedTo: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mono-bugs at lists.ximian.com</A>
ReportedBy: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">catanzariti at yahoo.com</A>
QAContact: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mono-bugs at lists.ximian.com</A>
Found By: ---
User-Agent: Mozilla/5.0 (X11; U; Linux i686; fr; rv:1.9.0.6)
Gecko/2009020911 Ubuntu/8.10 (intrepid) Firefox/3.0.6
This is the code to compile :
using System.Collections.Generic;
using System.Linq;
namespace CompilerCrashTest
{
public class A
{
public int id { get; set; }
}
public class B
{
public int id { get; set; }
}
public class LinqJoin
{
public LinqJoin()
{
IList&lt;A&gt; aList = new List&lt;A&gt;();
IList&lt;B&gt; bList = new List&lt;B&gt;();
// OK
(from a in aList
join b in bList on a.id equals b.id
select a).ToList();
// Compiler crash
(from a in aList
join b in bList on b.id equals a.id
select a).ToList();
}
}
}
This is the error message :
Building: CompilerCrashTest (Debug)
Ex&#233;cution de la compilation principale...
/opt/mono/bin/gmcs
&quot;/out:/home/michael/dev/CompilerCrashTest/bin/Debug/CompilerCrashTest.exe&quot;
&quot;/r:System.Core.dll&quot; /noconfig /nologo /warn:4 /debug:+ /debug:full /optimize-
/codepage:utf8 /define:&quot;DEBUG&quot; /t:exe
&quot;/home/michael/dev/CompilerCrashTest/Main.cs&quot;
&quot;/home/michael/dev/CompilerCrashTest/AssemblyInfo.cs&quot;
&quot;/home/michael/dev/CompilerCrashTest/QueryCompiler.cs&quot;
&quot;/home/michael/dev/CompilerCrashTest/LinqJoin.cs&quot;
Exception caught by the compiler while compiling:
Block that caused the problem begin at:
/home/michael/dev/CompilerCrashTest/LinqJoin.cs(30,43):
Block being compiled:
[/home/michael/dev/CompilerCrashTest/LinqJoin.cs(30,43):,/home/michael/dev/CompilerCrashTest/LinqJoin.cs(30,55):]
System.NullReferenceException: Object reference not set to an instance of an
object
Exception caught by the compiler while compiling:
Block that caused the problem begin at:
/home/michael/dev/CompilerCrashTest/LinqJoin.cs(18,24):
Block being compiled:
[/home/michael/dev/CompilerCrashTest/LinqJoin.cs(21,25):,/home/michael/dev/CompilerCrashTest/LinqJoin.cs(21,55):]
System.NullReferenceException: Object reference not set to an instance of an
object
Unhandled Exception: Mono.CSharp.InternalErrorException:
/home/michael/dev/CompilerCrashTest/LinqJoin.cs(18,24):
CompilerCrashTest.LinqJoin.LinqJoin() ---&gt; System.NullReferenceException:
Object reference not set to an instance of an object
at Mono.CSharp.ToplevelParameterInfo.get_ParameterType () [0x00000]
at Mono.CSharp.ParameterReference.DoResolveBase (Mono.CSharp.EmitContext ec)
[0x00000]
at Mono.CSharp.ParameterReference.DoResolve (Mono.CSharp.EmitContext ec)
[0x00000]
at Mono.CSharp.Expression.Resolve (Mono.CSharp.EmitContext ec, ResolveFlags
flags) [0x00000]
at Mono.CSharp.Expression.Resolve (Mono.CSharp.EmitContext ec) [0x00000]
at Mono.CSharp.SimpleName.DoSimpleNameResolve (Mono.CSharp.EmitContext ec,
Mono.CSharp.Expression right_side, Boolean intermediate) [0x00000]
at Mono.CSharp.SimpleName.SimpleNameResolve (Mono.CSharp.EmitContext ec,
Mono.CSharp.Expression right_side, Boolean intermediate) [0x00000]
at Mono.CSharp.SimpleName.DoResolve (Mono.CSharp.EmitContext ec, Boolean
intermediate) [0x00000]
at Mono.CSharp.Expression.Resolve (Mono.CSharp.EmitContext ec, ResolveFlags
flags) [0x00000]
at Mono.CSharp.MemberAccess.DoResolve (Mono.CSharp.EmitContext ec,
Mono.CSharp.Expression right_side) [0x00000]
at Mono.CSharp.MemberAccess.DoResolve (Mono.CSharp.EmitContext ec) [0x00000]
at Mono.CSharp.Expression.Resolve (Mono.CSharp.EmitContext ec, ResolveFlags
flags) [0x00000]
at Mono.CSharp.Expression.Resolve (Mono.CSharp.EmitContext ec) [0x00000]
at Mono.CSharp.SimpleName.DoSimpleNameResolve (Mono.CSharp.EmitContext ec,
Mono.CSharp.Expression right_side, Boolean intermediate) [0x00000]
at Mono.CSharp.SimpleName.SimpleNameResolve (Mono.CSharp.EmitContext ec,
Mono.CSharp.Expression right_side, Boolean intermediate) [0x00000]
at Mono.CSharp.SimpleName.DoResolve (Mono.CSharp.EmitContext ec, Boolean
intermediate) [0x00000]
at Mono.CSharp.Expression.Resolve (Mono.CSharp.EmitContext ec, ResolveFlags
flags) [0x00000]
at Mono.CSharp.MemberAccess.DoResolve (Mono.CSharp.EmitContext ec,
Mono.CSharp.Expression right_side) [0x00000]
at Mono.CSharp.MemberAccess.DoResolve (Mono.CSharp.EmitContext ec) [0x00000]
at Mono.CSharp.Expression.Resolve (Mono.CSharp.EmitContext ec, ResolveFlags
flags) [0x00000]
at Mono.CSharp.Expression.Resolve (Mono.CSharp.EmitContext ec) [0x00000]
at Mono.CSharp.Return.DoResolve (Mono.CSharp.EmitContext ec) [0x00000]
at Mono.CSharp.ContextualReturn.DoResolve (Mono.CSharp.EmitContext ec)
[0x00000]
at Mono.CSharp.ExitStatement.Resolve (Mono.CSharp.EmitContext ec) [0x00000]
at Mono.CSharp.Block.Resolve (Mono.CSharp.EmitContext ec) [0x00000]
at Mono.CSharp.EmitContext.ResolveTopBlock (Mono.CSharp.EmitContext
anonymous_method_host, Mono.CSharp.ToplevelBlock block,
Mono.CSharp.ParametersCompiled ip, IMethodData md, System.Boolean&amp; unreachable)
[0x00000]
--- End of inner exception stack trace ---
at Mono.CSharp.TypeContainer.EmitConstructors () [0x00000]
at Mono.CSharp.TypeContainer.EmitType () [0x00000]
at Mono.CSharp.RootContext.EmitCode () [0x00000]
at Mono.CSharp.Driver.Compile () [0x00000]
at Mono.CSharp.Driver.Main (System.String[] args) [0x00000]
Reproducible: Always
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