[Swig-user] what is warning 454? - not in the manual?

[Mark G. <ma...@xp...>]

Hello,

I am getting this warning when running

>swig -module foobar -python -c++ -shadow -outdir dist foobar.i


foobar.h:51: Warning 454: Setting a pointer/reference variable may leak
memory.

That line in foobar.h is:  static foobar *sInstance;


I can't find any explanation for this warning 454 in the documentation.
 What is this and how to avoid it?

Thank you

Mark