[Bug libgcc/56646] New: ICE: in cp_parser_late_return_type_opt, at cp/parser.c:16970

["pramodg at room77 dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56646

             Bug #: 56646
           Summary: ICE: in cp_parser_late_return_type_opt, at
                    cp/parser.c:16970
    Classification: Unclassified
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcc
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: pramodg@room77.com


Created attachment 29686
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29686
Preprocessed source

Return type resolution fails for functions inside a struct declared inside
other class Methods.

Tested on both g++4.7 (Debian 4.7.2-4) and g++ Snapshot (4.8.0 20130316)

$ /usr/lib/gcc-snapshot/bin/g++ -v -save-temps -Wall -Wextra -std=gnu++0x
abc.cc 
Using built-in specs.
COLLECT_GCC=/usr/lib/gcc-snapshot/bin/g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc-snapshot/libexec/gcc/x86_64-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 20130316-1'
--with-bugurl=file:///usr/share/doc/gcc-snapshot/README.Bugs
--enable-languages=c,ada,c++,java,go,fortran,objc,obj-c++
--prefix=/usr/lib/gcc-snapshot --enable-shared --enable-linker-build-id
--disable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin
--with-system-zlib --disable-browser-plugin --enable-java-awt=gtk
--enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-snap-amd64/jre
--enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-snap-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-snap-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --with-arch-32=i586 --with-abi=m64
--with-multilib-list=m32,m64 --with-tune=generic --disable-werror
--enable-checking=yes --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 4.8.0 20130316 (experimental) [trunk revision 196694] (Debian
20130316-1) 
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=gnu++11'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc-snapshot/libexec/gcc/x86_64-linux-gnu/4.8.0/cc1plus -E -quiet -v
-imultilib . -imultiarch x86_64-linux-gnu -D_GNU_SOURCE abc.cc -mtune=generic
-march=x86-64 -std=gnu++11 -Wall -Wextra -fpch-preprocess -o abc.ii
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/4.8.0/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:

/usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/4.8.0/../../../../include/c++/4.8.0

/usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/4.8.0/../../../../include/c++/4.8.0/x86_64-linux-gnu/.

/usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/4.8.0/../../../../include/c++/4.8.0/backward
 /usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/4.8.0/include
 /usr/local/include
 /usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/4.8.0/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=gnu++11'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc-snapshot/libexec/gcc/x86_64-linux-gnu/4.8.0/cc1plus
-fpreprocessed abc.ii -quiet -dumpbase abc.cc -mtune=generic -march=x86-64
-auxbase abc -Wall -Wextra -std=gnu++11 -version -o abc.s
GNU C++ (Debian 20130316-1) version 4.8.0 20130316 (experimental) [trunk
revision 196694] (x86_64-linux-gnu)
    compiled by GNU C version 4.8.0 20130316 (experimental) [trunk revision
196694], GMP version 5.0.5, MPFR version 3.1.1-p2, MPC version 0.9
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C++ (Debian 20130316-1) version 4.8.0 20130316 (experimental) [trunk
revision 196694] (x86_64-linux-gnu)
    compiled by GNU C version 4.8.0 20130316 (experimental) [trunk revision
196694], GMP version 5.0.5, MPFR version 3.1.1-p2, MPC version 0.9
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 179a73a5a5f01088a1db5a487424c1fe
abc.cc: In member function 'void Foo::Func()':
abc.cc:23:16: internal compiler error: in cp_parser_late_return_type_opt, at
cp/parser.c:16970
     auto Bar() -> int {
                ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-snapshot/README.Bugs> for instructions.
Preprocessed source stored into /tmp/cc1Bz05T.out file, please attach this to
your bugreport.

-------------------------------------------------------
Source Code:
-------------------------------------------------------

void Func() {
  struct StructDeclaredInsideFunc {
    // This is OK.
    auto Bar() -> int {
      return 1;
    }
  };
}

class Foo {
  public:
  void Func();
};

void Foo::Func() {
  struct StructDeclaredInsideClassFunc {
    // Causes:
    // g++4.7 (Debian 4.7.2-4): internal compiler error: in
cp_parser_late_return_type_opt, at
    // cp/parser.c:16698
    // g++ Snapshot (4.8.0 20130316): internal compiler error: in
cp_parser_late_return_type_opt, at
    // cp/parser.c:16970
    auto Bar() -> int {
      return 1;
    }
  };
}

-------------------------------------------------------