Bug#630441: g++-4.6 miscompilation

[Philip Ashmore <contact@philipashmore.com>]

Hi there.
I believe I've tracked down the problem.

I've published new versions of v3c(1.9.0-03), treedb(1.1.0-01) and 
meta-treedb(1.3.0-02) in SourceForge, which gets around this problem.

It appears that gcc-4.6 (and clang for that matter) make some dodgy 
decisions about what appear to be references to temporaries created 
during optimization.

Looking at meta-treedb's v3c/1-comet/cxx-string-list-test.cpp, line 75:
    typedef char * DataType;
is the heart of the problem.
The change at line 77:
    typedef char DataType[0];
guides the compiler along the proper path.

Neither compiler has a problem with either option in debug (-O0) builds 
and the tests pass.

I guess the compiler should issue warnings or errors, depending on how 
you want to handle this.

Regards,
Philip