The following code generates an tree check error in cp/pt.c of gcc 4.5 trunk
(11/15/2009). This is a kernel that reproduces the error in a larger project.
Both the kernel and original code compile and run correctly in previous
versions of gcc.
template<typename T>
struct A
{
static const int size = 1;
};
template<int Integral>
struct B
{
typedef int type;
};
template<typename T>
struct C
{
typedef int type;
};
template<typename X, typename Y = void>
struct D
{
typedef typename C<X>::type T;
typedef A<T> AT;
typedef typename B<AT::size>::type type;
};
template<typename X>
struct D<X&, void>
{
typedef typename C<X>::type T;
typedef A<T> AT;
typedef typename B<AT::size>::type type;
};
main()
{
D<bool&> t;
}
gcc -v -save-temps -o test test.cc
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/gnu/gcc-4.5.trunk.10.14.09/libexec/gcc/i686-pc-linux-gnu/4.5.0/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: ../gcc.trunk/configure --enable-languages=c++
--prefix=/usr/local/gnu/gcc-4.5.trunk.10.14.09
--with-mpfr=/usr/local/gnu/mpfr-2.4.1
Thread model: posix
gcc version 4.5.0 20091110 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-o' 'test' '-mtune=generic'
/usr/local/gnu/gcc-4.5.trunk.10.14.09/libexec/gcc/i686-pc-linux-gnu/4.5.0/cc1plus
-E -quiet -v -D_GNU_SOURCE test.cc -mtune=generic -fpch-preprocess -o test.ii
ignoring nonexistent directory
"/usr/local/gnu/gcc-4.5.trunk.10.14.09/lib/gcc/i686-pc-linux-gnu/4.5.0/../../../../i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/gnu/gcc-4.5.trunk.10.14.09/lib/gcc/i686-pc-linux-gnu/4.5.0/../../../../include/c++/4.5.0
/usr/local/gnu/gcc-4.5.trunk.10.14.09/lib/gcc/i686-pc-linux-gnu/4.5.0/../../../../include/c++/4.5.0/i686-pc-linux-gnu
/usr/local/gnu/gcc-4.5.trunk.10.14.09/lib/gcc/i686-pc-linux-gnu/4.5.0/../../../../include/c++/4.5.0/backward
/usr/local/include
/usr/local/gnu/gcc-4.5.trunk.10.14.09/include
/usr/local/gnu/gcc-4.5.trunk.10.14.09/lib/gcc/i686-pc-linux-gnu/4.5.0/include
/usr/local/gnu/gcc-4.5.trunk.10.14.09/lib/gcc/i686-pc-linux-gnu/4.5.0/include-fixed
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-o' 'test' '-mtune=generic'
/usr/local/gnu/gcc-4.5.trunk.10.14.09/libexec/gcc/i686-pc-linux-gnu/4.5.0/cc1plus
-fpreprocessed test.ii -quiet -dumpbase test.cc -mtune=generic -auxbase test
-version -o test.s
GNU C++ (GCC) version 4.5.0 20091110 (experimental) (i686-pc-linux-gnu)
compiled by GNU C version 4.5.0 20091110 (experimental), GMP version
4.3.1, MPFR version 2.4.1-p5
warning: GMP header version 4.3.1 differs from library version 4.1.4.
warning: MPFR header version 2.4.1-p5 differs from library version 2.3.0.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C++ (GCC) version 4.5.0 20091110 (experimental) (i686-pc-linux-gnu)
compiled by GNU C version 4.5.0 20091110 (experimental), GMP version
4.3.1, MPFR version 2.4.1-p5
warning: GMP header version 4.3.1 differs from library version 4.1.4.
warning: MPFR header version 2.4.1-p5 differs from library version 2.3.0.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: a2f4d0ba16c13073ade98a90c4f4dd49
test.cc: In instantiation of 'D<bool&>':
test.cc:41:12: instantiated from here
test.cc:36:38: internal compiler error: tree check: accessed elt 2 of tree_vec
with 1 elts in tsubst, at cp/pt.c:9721
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
--
Summary: 4.5 fails
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: nthomas at cs dot tamu dot edu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42069
