[Bug c++/66564] New: ICE on explicit instantiation of nested template class

["nurupo.ga.ga.ga at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66564

            Bug ID: 66564
           Summary: ICE on explicit instantiation of nested template class
           Product: gcc
           Version: 5.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nurupo.ga.ga.ga at gmail dot com
  Target Milestone: ---

The following code generates an ice:

//Begin Sample Code
template<class T1, class T2>
class Outer{
        template<class S1, class S2> class Inner;
};

template<> template<class T1, class T2> class Outer<T1, T2>::Inner<T1,T2>{};

template class Outer<int,int>::Inner<int,int>;
//End Sample Code


error message:
test.cpp:6:62: internal compiler error: in retrieve_specialization, at
cp/pt.c:1059
 template<> template<class T1, class T2> class Outer<T1, T2>::Inner<T1,T2>{};
                                                              ^
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


command line:
gcc -v -save-temps test.cpp


output:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=d:/program\ files\
(x86)/dev-cpp/mingw64/bin/../libexec/gcc/x86_64-w64-mingw32/5.1.1/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: /home/cauchy/vcs/svn/gcc/branches/gcc-5-branch/configure
--prefix=/home/cauchy/native/gcc-5-win64
--with-sysroot=/home/cauchy/native/gcc-5-win64 --build=x86_64-unknown-linux-gnu
--host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --disable-gcov-tool
--disable-multilib --disable-nls --disable-win32-registry
--enable-checking=release --enable-languages=c,c++,fortran
--enable-fully-dynamic-string --with-arch=core2 --with-tune=generic
Thread model: win32
gcc version 5.1.1 (GCC) 
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-mtune=generic' '-march=core2'
 d:/program files
(x86)/dev-cpp/mingw64/bin/../libexec/gcc/x86_64-w64-mingw32/5.1.1/cc1plus.exe
-E -quiet -v -iprefix d:\program files
(x86)\dev-cpp\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/5.1.1/ -U_REENTRANT
test.cpp -mtune=generic -march=core2 -fpch-preprocess -o test.ii
ignoring duplicate directory "d:/program files
(x86)/dev-cpp/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/5.1.1/../../../../include/c++/5.1.1"
ignoring duplicate directory "d:/program files
(x86)/dev-cpp/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/5.1.1/../../../../include/c++/5.1.1/x86_64-w64-mingw32"
ignoring duplicate directory "d:/program files
(x86)/dev-cpp/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/5.1.1/../../../../include/c++/5.1.1/backward"
ignoring duplicate directory "d:/program files
(x86)/dev-cpp/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/5.1.1/include"
ignoring nonexistent directory
"/home/cauchy/native/gcc-5-win64/home/cauchy/native/gcc-5-win64/lib/gcc/x86_64-w64-mingw32/5.1.1/../../../../include"
ignoring duplicate directory "d:/program files
(x86)/dev-cpp/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/5.1.1/include-fixed"
ignoring duplicate directory "d:/program files
(x86)/dev-cpp/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/5.1.1/../../../../x86_64-w64-mingw32/include"
ignoring nonexistent directory "/home/cauchy/native/gcc-5-win64/mingw/include"
#include "..." search starts here:
#include <...> search starts here:
 d:\program files
(x86)\dev-cpp\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/5.1.1/../../../../include/c++/5.1.1
 d:\program files
(x86)\dev-cpp\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/5.1.1/../../../../include/c++/5.1.1/x86_64-w64-mingw32
 d:\program files
(x86)\dev-cpp\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/5.1.1/../../../../include/c++/5.1.1/backward
 d:\program files
(x86)\dev-cpp\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/5.1.1/include
 d:\program files
(x86)\dev-cpp\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/5.1.1/include-fixed
 d:\program files
(x86)\dev-cpp\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/5.1.1/../../../../x86_64-w64-mingw32/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-mtune=generic' '-march=core2'
 d:/program files
(x86)/dev-cpp/mingw64/bin/../libexec/gcc/x86_64-w64-mingw32/5.1.1/cc1plus.exe
-fpreprocessed test.ii -quiet -dumpbase test.cpp -mtune=generic -march=core2
-auxbase test -version -o test.s
GNU C++ (GCC) version 5.1.1 (x86_64-w64-mingw32)
        compiled by GNU C version 5.1.1, GMP version 5.1.3, MPFR version
3.1.2-p11, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++ (GCC) version 5.1.1 (x86_64-w64-mingw32)
        compiled by GNU C version 5.1.1, GMP version 5.1.3, MPFR version
3.1.2-p11, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: b5faee4d84f4cec59dcc3ea208cd79d6
test.cpp:6:62: internal compiler error: in retrieve_specialization, at
cp/pt.c:1059
 template<> template<class T1, class T2> class Outer<T1, T2>::Inner<T1,T2>{};
                                                              ^
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


test.ii:
# 1 "test.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "test.cpp"
template<class T1, class T2>
class Outer{
 template<class S1, class S2> class Inner;
};

template<> template<class T1, class T2> class Outer<T1, T2>::Inner<T1,T2>{};

template class Outer<int,int>::Inner<int,int>;