[Mono-list] NullReferenceException at System.Xml.Serialization.XmlSerializer

[Andres G. Aragoneses]

Dave, what version of mono are you using?

If you cannot reproduce these problems reliably when dealing with SOAP 
deserialization, you may be hitting a concurrency bug fixed in here:

https://github.com/mono/mono/commit/9a8ed89


On 09/01/13 18:18, Dave Curylo wrote:
> For what it's worth, I get these exceptions from time to time
> deserializing SOAP responses.  It's difficult for me to file a test case
> for this as the exact same response will not always result in this
> exception. It's a sporadic issue for me but it seems to be a problem in
> generating the serializer classes.
>
> In most cases, I have to just catch the exception and work around it by
> retrieving the response data from the service again.
>
> Hopefully Esben's case is a little more straight forward and he can
> reproduce it reliably.
>
> On Wednesday, January 9, 2013, Andres G. Aragoneses wrote:
>
>     On 09/01/13 17:21, Esben Laursen wrote:
>
>         Hi All,
>
>         I sometimes get this execption to the console on my app. I have not
>         really identified what part of my code that is generating the
>         exception
>         (I use xml serializers extensively). The app does not crash and I am
>         fairly sure that I have wrapped all the parts of my code in a
>         try/catch..
>
>         Here is the output to the console.
>
>         Serializer could not be generated
>         System.NullReferenceException: Object reference not set to an
>         instance
>         of an object
>             at System.Xml.Serialization.__TypeData.ToCSharpName
>         (System.Type type,
>         Boolean full) [0x00000] in <filename unknown>:0
>             at System.Xml.Serialization.__TypeData.get_CSharpFullName ()
>         [0x00000]
>         in <filename unknown>:0
>             at
>         System.Xml.Serialization.__SerializationCodeGenerator.__GenerateReadObject
>         (System.Xml.Serialization.__XmlTypeMapping typeMap) [0x00000] in
>         <filename
>         unknown>:0
>             at
>         System.Xml.Serialization.__SerializationCodeGenerator.__GenerateReader
>         (System.String readerClassName, System.Collections.ArrayList maps)
>         [0x00000] in <filename unknown>:0
>             at
>         System.Xml.Serialization.__SerializationCodeGenerator.__GenerateSerializers
>         (System.IO.TextWriter writer) [0x00000] in <filename unknown>:0
>             at
>         System.Xml.Serialization.__XmlSerializer.__GenerateSerializers
>         (System.Xml.Serialization.__GenerationBatch batch,
>         System.CodeDom.Compiler.__CompilerParameters cp) [0x00000] in
>         <filename
>         unknown>:0
>
>         I am running mono 3.0.1 complied from source on a Fedora Core..
>
>         Can any of you guys identify if this is a "bug" in mono or in my
>         code..
>         (and yes I might send something "wrong" into the serializer :-)
>
>         Hope you can help..
>
>
>
>     No matter how wrong you think the value to the serializer is, a
>     NullReferenceException should never be generated from inside any
>     class library, so this is likely a mono bug. File it with a minimal
>     testcase in http://bugzilla.xamarin.com/
>
>
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