[Ironpython-users] IronPython, Daily Digest 1/30/2013

[CodePlex]

Hi ironpython,

Here's your Daily Digest of new issues for project "IronPython".

In today's digest:ISSUES

1. [New comment] Failure to bind base accessor if only one accessor is overridden in derived class
2. [New issue] struct.pack not threadsafe

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ISSUES

1. [New comment] Failure to bind base accessor if only one accessor is overridden in derived class
http://ironpython.codeplex.com/workitem/31861
User mvdk has commented on the issue:

"On line 228 of PythonTypeInfo.cs: res = FilterSpecialNames(binder.GetMember(curType, name), name, action);

binder.GetMember(curType, name) needs flags to tell it to retrieve resp. GetField | GetProperty, SetField | SetProperty.  Perhaps these should be higher priority resolvers."-----------------

2. [New issue] struct.pack not threadsafe
http://ironpython.codeplex.com/workitem/33720
User mvdk has proposed the issue:

"When using paramiko with more than one process spawning, I
occasionally get the following:

System.InvalidOperationException: The LinkedList node already belongs
to a LinkedList.
   at System.Collections.Generic.LinkedList`1.ValidateNewNode(LinkedListNode`1
node)   at System.Collections.Generic.LinkedList`1.AddFirst(LinkedListNode`1
node)
   at IronPython.Modules.PythonStruct.pack(CodeContext context, String
fmt, Object[] values)
   at CallSite.Target(Closure , CallSite , CodeContext , Object ,
String , Object )
   at paramiko.message$37.add_int$491(PythonFunction $function, Object
self, Object n) in
C:\repo\trunk\external\python\paramiko\message.py:line 227
   at paramiko.message$37.add_string$494(PythonFunction $function,
Object self, Object s) in
C:\repo\trunk\external\python\paramiko\message.py:line 259
   at paramiko.transport$13.open_channel$273(PythonFunction $function,
Object self, Object kind, Object dest_addr, Object src_addr) in
C:\repo\trunk\external\python\paramiko\transport.py:line 773
   ... Lots more in the stack trace.

I think that this is due to PythonStruct.pack's usage of CacheDict,
which is explicitly marked as not thread safe.  A quick and dirty hack
would be to force all users of _cache to lock it first, though I'm
sure there's a better answer.

Reproducing this has been troublesome (with what we have, I found that it triggered maybe once every 10 runs), but I'm sure that someone can think of a way :)"
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