The following program gives an internal compiler error, when built with the command line:  g++ -std=c++11 main.cpp

//---------------------------------------------------

template <typename T, decltype(sizeof(T)) N>
auto array_size(T(&)[N]) -> decltype(N) { return N; }

int main() {
   int simple[4] = {};
   int result =  array_size(simple);

   return result;
}

//---------------------------------------------------


The error I get from my build of gcc is:

main.cpp: In function 'int main()':
main.cpp:1:38: internal compiler error: in dependent_type_p, at cp/pt.c:19249
 template <typename T, decltype(sizeof(T)) N>
                                      ^

main.cpp:1:38: internal compiler error: Abort trap: 6
g++-mp-4.8: internal compiler error: Abort trap: 6 (program cc1plus)
Abort trap: 6


Build is a recent version obtained from MacPorts, running on the latest Apple Mountain Lion OS with up to date patches.

g++ -v:

Using built-in specs.
COLLECT_GCC=g++-mp-4.8
COLLECT_LTO_WRAPPER=/opt/local/libexec/gcc/x86_64-apple-darwin12/4.8.0/lto-wrapper
Target: x86_64-apple-darwin12
Configured with: ../gcc-4.8-20121125/configure --prefix=/opt/local --build=x86_64-apple-darwin12 --enable-languages=c,c++,objc,obj-c++,fortran,java --libdir=/opt/local/lib/gcc48 --includedir=/opt/local/include/gcc48 --infodir=/opt/local/share/info --mandir=/opt/local/share/man --datarootdir=/opt/local/share/gcc-4.8 --with-local-prefix=/opt/local --with-system-zlib --disable-nls --program-suffix=-mp-4.8 --with-gxx-include-dir=/opt/local/include/gcc48/c++/ --with-gmp=/opt/local --with-mpfr=/opt/local --with-mpc=/opt/local --with-ppl=/opt/local --with-cloog=/opt/local --enable-cloog-backend=isl --disable-cloog-version-check --enable-stage1-checking --disable-multilib --enable-lto --enable-libstdcxx-time --with-as=/opt/local/bin/as --with-ld=/opt/local/bin/ld --with-ar=/opt/local/bin/ar --with-bugurl=https://trac.macports.org/newticket --with-pkgversion='MacPorts gcc48 4.8-20121125_0'
Thread model: posix
gcc version 4.8.0 20121125 (experimental) (MacPorts gcc48 4.8-20121125_0)