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https://issues.apache.org/jira/browse/LOG4NET-393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13783016#comment-13783016
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W.R. Dittmer edited comment on LOG4NET-393 at 10/2/13 7:11 AM:
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Thanks, we'll wait for the next official release and stick to 1.2.10 in the
mean time.
Applied patch to the attached test project and it now runs.
Applied patch to production code, which now also runs.
was (Author: wdittmer):
Thanks, we'll wait for the next official release and stick to 1.2.10 in the
mean time.
I will check the code change tomorrow and verify it fixes the attached project
and
works for our production software.
> Using dynamic methods with log4net causes NullReferenceException in
> StackFrameItem
> ----------------------------------------------------------------------------------
>
> Key: LOG4NET-393
> URL: https://issues.apache.org/jira/browse/LOG4NET-393
> Project: Log4net
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.2.12
> Environment: VS2012, Windows 7
> Reporter: W.R. Dittmer
> Assignee: Dominik Psenner
> Priority: Blocker
> Fix For: 1.2.13
>
> Attachments: Log4netLambaExpressionTest.zip
>
>
> In our production code we use dynamic methods e.g. when using the factory
> pattern. We upgraded from 1.2.10 to 1.2.12 and encountered the following
> exception:
> log4net:ERROR An exception ocurred while retreiving stack frame information.
> System.NullReferenceException: Object reference not set to an instance of an
> object.
> at log4net.Core.StackFrameItem..ctor(StackFrame frame) in
> c:\Users\wilfred.dittmer\Documents\Visual Studio
> 2012\Projects\Log4netLambaExpressionTest\log4net-1.2.12-src\log4net-1.2.12\src\Core\StackFrameItem.cs:line
> 61
> I created a test project (attached) which shows the exception occuring.
> If the method is: {System.Object
> lambda_method(System.Runtime.CompilerServices.Closure)}
> then one cannot access the DeclaringType. The code then tries to get the
> FullName of the null value which causes the exception.
> According to:
> http://msdn.microsoft.com/en-us/library/system.reflection.emit.dynamicmethod.declaringtype.aspx
> "DynamicMethod.DeclaringType: Gets the type that declares the method, which
> is always null for dynamic methods."
> So it seems best to check if DeclaringType is null and if so leave the
> m_className set to 'NA'.
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