[Bug c++/12573] [3.4 Regression ] ICE (segfault) with Boost.Python

["bangerth at dealii dot org" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12573


bangerth at dealii dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |3.4


------- Additional Comments From bangerth at dealii dot org  2003-10-16 19:19 -------
This is somewhat cleaner:
---------------------------
template <bool> struct S;

template <typename> struct Y {
    int x;
};

template <class T> struct Z {
    S< (bool)(&static_cast<Y<T> *>(0)->x == 0) >
    s;
};
-------------------------------

g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -c x.cc
x.cc:8: internal compiler error: Segmentation fault
Please submit a full bug report,

This is a regression. As to what goes wrong: if one replaces Y<T> in
the cast by Y<int>, one gets:

g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -c x.cc
x.cc:8: error: a cast to a type other than an integral or enumeration type
cannot appear in a constant-expression
x.cc:9: error: template argument 1 is invalid

Maybe this gives a clue as to what goes wrong...

W.