[Bug c++/50261] New: [c++0x] ICE on brace-initialize an array member

["kikairoya at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50261

             Bug #: 50261
           Summary: [c++0x] ICE on brace-initialize an array member
    Classification: Unclassified
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: kikairoya@gmail.com


An ICE occurs with this code:

template <typename T>
struct ca {
    T elem[1];

    // ICE occurs ...
    ca(const T (&s)[1]): elem{{s}} { } // here
    //ca(const T (&s)[1]): elem({{s}}) { } // or here.
    //ca(const T (&s)[1]): elem(s) { } // but not here (rejects correctly.)
    //ca(const T (&s)[1]): elem{s} { } // also rejects correctly.

    // also occurs ...
    ca(const T &v): elem{{v}} { } // here
    //ca(const T &v): elem{{{v}}} { } // and here, or more braces.
    //ca(const T &v): elem{v} { } // pass.
    //ca(const T &v): elem({v}) { } // pass (with warning).
};

int main() {
    int a[1] = {0};
    ca<int> d(a);
    ca<int> e(a[0]);
}



causes:
test.cc: In instantiation of 'ca<T>::ca(const T (&)[1]) [with T = int]':
test.cc:20:13:   required from here
test.cc:6:31: internal compiler error: in cxx_eval_bare_aggregate, at
cp/semantics.c:6679
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-snapshot/README.Bugs> for instructions.


tested:
gcc version 4.6.1 (Debian 4.6.1-3)
gcc version 4.7.0 20110816 (experimental) [trunk revision 177785] (Debian
20110816-1)