[Bug c++/49838] New: [C++0x] ICE in cp_parser_perform_range_for_lookup, at cp/parser.c:8796

[Bug c++/49838] New: [C++0x] ICE in cp_parser_perform_range_for_lookup, at cp/parser.c:8796

[sscrisk at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49838

           Summary: [C++0x] ICE in cp_parser_perform_range_for_lookup, at
                    cp/parser.c:8796
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: sscrisk@gmail.com


The g++ 4.7.0 20110723 (experimental) compile the ill-formed codes
when compiler say (normal) compiler error and ICE messages.


Codes here:

int main()
{
 auto a;
 for(auto i: a)
  ;
}


Compiler messages:

$ g++4.7 -std=c++0x -Wall -Wextra -pedantic a.cpp
a.cpp: In function 'int main()':
a.cpp:3:7: error: declaration of 'auto a' has no initializer
a.cpp:4:14: error: unable to deduce 'auto&&' from 'a'
a.cpp:4:14: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in cp_parser_
perform_range_for_lookup, at cp/parser.c:8796
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


Version info:

$ g++4.7 -v
Built by Equation Solution <http://www.Equation.com>.
Using built-in specs.
COLLECT_GCC=C:\cygwin\home\RiSK\misc\gcc4.7\bin\g++.exe
COLLECT_LTO_WRAPPER=c:/cygwin/home/risk/misc/gcc4.7/bin/../libexec/gcc/i686-pc-mingw32/4.7.0/lto-wrapper.exe
Target: i686-pc-mingw32
Configured with: ../gcc-4.7-20110723-mingw/configure --host=i686-pc-mingw32
--build=x86_64-unknown-linux-gnu --target
=i686-pc-mingw32
--prefix=/home/gfortran/gcc-home/binary/mingw32/native/x86_32/gcc/4.7-20110723
--with-gcc --with-gnu
-as --with-gnu-ld --with-host-libstdcxx='-lstdc++ -lsupc++ -lm'
--with-ppl=/home/gfortran/gcc-home/binary/mingw32/nat
ive/x86_32/ppl
--with-cloog=/home/gfortran/gcc-home/binary/mingw32/native/x86_32/cloog
--with-gmp=/home/gfortran/gcc-
home/binary/mingw32/native/x86_32/gmp
--with-mpfr=/home/gfortran/gcc-home/binary/mingw32/native/x86_32/mpfr --with-mp
c=/home/gfortran/gcc-home/binary/mingw32/native/x86_32/mpc
--with-sysroot=/home/gfortran/gcc-home/binary/mingw32/cros
s/x86_32/gcc/4.7-20110723 --disable-shared --disable-nls --disable-tls
--disable-win32-registry --enable-libquadmath-
support --enable-libquadmath --enable-languages=c,c++,fortran --enable-libgomp
--enable-threads=win32 --enable-lto --
enable-static --enable-shared=lto-plugin --enable-plugins --enable-ld=yes
--enable-cloog-backend=ppl
Thread model: win32
gcc version 4.7.0 20110723 (experimental) (GCC)

[Bug c++/49838] [C++0x] ICE in cp_parser_perform_range_for_lookup, at cp/parser.c:8796

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49838

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011.07.25 12:36:10
         AssignedTo|unassigned at gcc dot       |paolo.carlini at oracle dot
                   |gnu.org                     |com
     Ever Confirmed|0                           |1

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-07-25 12:36:10 UTC ---
Confirmed, seems easy to fix. Note, happens only with checking enabled.

[Bug c++/49838] [C++0x] ICE in cp_parser_perform_range_for_lookup, at cp/parser.c:8796

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49838

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.7.0

[Bug c++/49838] [C++0x] ICE in cp_parser_perform_range_for_lookup, at cp/parser.c:8796

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49838

--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2011-07-25 15:29:16 UTC ---
Author: paolo
Date: Mon Jul 25 15:29:13 2011
New Revision: 176754

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=176754
Log:
/cp
2011-07-25  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/49838
    * parser.c (cp_parser_perform_range_for_lookup): Early return if
    error_operand_p (range).

/testsuite
2011-07-25  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/49838
    * g++.dg/cpp0x/range-for19.C: New.


Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/range-for19.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/parser.c
    trunk/gcc/testsuite/ChangeLog

[Bug c++/49838] [C++0x] ICE in cp_parser_perform_range_for_lookup, at cp/parser.c:8796

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49838

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-07-25 15:30:20 UTC ---
Done.