[Bug c++/65721] New: Internal compiler error segmentation fault

[Bug c++/65721] New: Internal compiler error segmentation fault

[t.keck at online dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65721

            Bug ID: 65721
           Summary: Internal compiler error segmentation fault
           Product: gcc
           Version: 4.8.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: t.keck at online dot de

Following code produces a segmentation fault with gcc 4.8.2.
gcc 4.7.2 and 4.6.3 reject the code (which is probably invalid c++), without
segmentation code.

tkeck@ekplx12:~$ cat test.cpp 

template<typename T>
class A {
        public:
                typedef T D;
};

template<typename X>
class B : public A<X> {
        using typename B::D; // Triggers segfault and probably invalid C++
        //using typename A<X>::D; // Works fine and probably valid C++
        public:
                D echo(D x) {
                        return x;
                }
};

int main() {
        B<int> b;
}

tkeck@ekplx12:~$ g++ test.cpp 
g++: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.


tkeck@ekplx12:~$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.8.2-19ubuntu1'
--with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs
--enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.8 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls
--with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap
--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-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)

[Bug c++/65721] [4.8/4.9/5 Regression] Internal compiler error segmentation fault

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65721

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-04-09
                 CC|                            |jakub at gcc dot gnu.org
            Summary|Internal compiler error     |[4.8/4.9/5 Regression]
                   |segmentation fault          |Internal compiler error
                   |                            |segmentation fault
     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
ICE started with r207407.

[Bug c++/65721] [4.8/4.9/5 Regression] Internal compiler error segmentation fault

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65721

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
           Priority|P3                          |P2
   Target Milestone|---                         |4.8.5

[Bug c++/65721] [4.8/4.9/5 Regression] Internal compiler error segmentation fault

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65721

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This is an infinite loop: strip_using_decl calls make_typename_type that calls
strip_using_decl with the same type...

The code is IMHO invalid.

[Bug c++/65721] [4.8/4.9/5 Regression] Internal compiler error segmentation fault

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65721

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|ice-on-valid-code           |ice-on-invalid-code
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |jason at gcc dot gnu.org

[Bug c++/65721] [4.8/4.9/5/6 Regression] Internal compiler error segmentation fault

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65721

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Apr 14 15:29:34 2015
New Revision: 222096

URL: https://gcc.gnu.org/viewcvs?rev=222096&root=gcc&view=rev
Log:
    PR c++/65721
    * name-lookup.c (do_class_using_decl): Complain about specifying
    the current class even if there are dependent bases.

Added:
    trunk/gcc/testsuite/g++.dg/lookup/using55.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/name-lookup.c

[Bug c++/65721] [4.8/4.9/5/6 Regression] Internal compiler error segmentation fault

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65721

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Apr 22 20:52:57 2015
New Revision: 222338

URL: https://gcc.gnu.org/viewcvs?rev=222338&root=gcc&view=rev
Log:
    PR c++/65721
    * name-lookup.c (do_class_using_decl): Complain about specifying
    the current class even if there are dependent bases.

Added:
    branches/gcc-5-branch/gcc/testsuite/g++.dg/lookup/using55.C
Modified:
    branches/gcc-5-branch/gcc/cp/ChangeLog
    branches/gcc-5-branch/gcc/cp/name-lookup.c

[Bug c++/65721] [4.8/4.9/5/6 Regression] Internal compiler error segmentation fault

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65721

--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Apr 23 13:20:08 2015
New Revision: 222363

URL: https://gcc.gnu.org/viewcvs?rev=222363&root=gcc&view=rev
Log:
    PR c++/65721
    * name-lookup.c (do_class_using_decl): Complain about specifying
    the current class even if there are dependent bases.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/g++.dg/lookup/using55.C
Modified:
    branches/gcc-4_8-branch/gcc/cp/ChangeLog
    branches/gcc-4_8-branch/gcc/cp/name-lookup.c

[Bug c++/65721] [4.8/4.9/5/6 Regression] Internal compiler error segmentation fault

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65721

--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Apr 23 13:21:11 2015
New Revision: 222366

URL: https://gcc.gnu.org/viewcvs?rev=222366&root=gcc&view=rev
Log:
    PR c++/65721
    * name-lookup.c (do_class_using_decl): Complain about specifying
    the current class even if there are dependent bases.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/g++.dg/lookup/using55.C
Modified:
    branches/gcc-4_9-branch/gcc/cp/ChangeLog
    branches/gcc-4_9-branch/gcc/cp/name-lookup.c

[Bug c++/65721] [4.8/4.9/5/6 Regression] Internal compiler error segmentation fault

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65721

Jason Merrill <jason at gcc dot gnu.org> changed:

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

--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 4.8.5/4.9.3/5.2/6.