[Bug c++/47686] scope of variables declared within a nested for loop is trivial

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47686

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-02-10 
19:41:12 UTC ---
the code has undefined behaviour