g++ crashed with casting

[Michael Tsang]

$ cat gcc_bug.cpp
int main(){
        typedef const int&&trrc;
        trrc(0);
}
$ g++ -std=c++0x gcc_bug.cpp -o gcc_bug
gcc_bug.cpp: In function ‘int main()’:
gcc_bug.cpp:3: internal compiler error: in cp_build_c_cast, at cp/typeck.c:5832
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.4/README.Bugs> for instructions.
$ g++-4.3 -std=c++0x gcc_bug.cpp -o gcc_bug
gcc_bug.cpp: In function ‘int main()’:
gcc_bug.cpp:3: internal compiler error: in build_c_cast, at cp/typeck.c:5659
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.3/README.Bugs> for instructions.
$

[Felix Crux (felixc)]

I can confirm this on my version of GCC as well (though I can't claim to understand what the code is *supposed* to do. But clearly the way it fails is incorrect). All the info required for an upstream bug report is reproduced below. I could not find an upstream bug for this issue, so perhaps it should be passed on up to them? I did not do so myself because the bug reporting instructions don't seem too friendly to reports from distro-specific packages.

$ gcc -v
Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.3.3-5ubuntu4' --with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3 --program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr --enable-targets=all --with-tune=generic --enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu
Thread model: posix
gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4)

$ cat test.cpp
int main(){
        typedef const int&&trrc;
        trrc(0);
}

$ cat test.ii
# 1 "test.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "test.cpp"
int main(){
        typedef const int&&trrc;
        trrc(0);
}

$ g++ -std=c++0x -save-temps test.cpp
test.cpp: In function ‘int main()’:
test.cpp:3: internal compiler error: in build_c_cast, at cp/typeck.c:5659
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.3/README.Bugs> for instructions.

[Matthias Klose (doko)]

fixed in both 4.3 and 4.4 in karmic