[Bug c++/59389] [C++11] bogus error: call of overloaded ‘Foo(<brace-enclosed initializer list>)’ is ambiguous

["manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59389

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

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

--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Even in the first case the diagnostic is quite poor compared with clang's
(location info included).
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From: "awwafa at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/59391] New: std::sort will go out of std::vector bounds and crash
Date: Wed, 04 Dec 2013 22:13:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idY391

            Bug ID: 59391
           Summary: std::sort will go out of std::vector bounds and crash
           Product: gcc
           Version: 4.4.6
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: awwafa at gmail dot com

$ gcc -v
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-ppl --with-cloog --with-tune=generic --with-arch_32=i686
--build=x86_64-redhat-linux
Thread model: posix
gcc version 4.4.6 20110731 (Red Hat 4.4.6-3) (GCC)

----------- gcc switches used -----
g++  -o sort_test.o  -c sort_test.cxx
g++  -o sort_test  sort_test.o

------------ sort_test.cxx---------
#include <algorithm>
#include <vector>

bool compare_val(int* a, int* b) {
   if (*a <= *b) return true;
   return false;
}
int main (void) {

  const int int_array[] = {12, 13, 2, 2, 6, 7, 12, 2, 10, 11, 16, 5, 5, 2, 16,
7, 6, 16, 14, 5, 10, 9, 14, 3, 7, 15, 14, 6, 2, 1, 11, 13, 14, 12, 15, 4, 3,
11, 5, 12, 5, 5, 1, 9, 6, 16, 15, 11, 16, 13, 15, 10, 6, 13, 13, 12, 11, 10, 1,
13, 11, 11, 10, 9, 7, 8, 12, 10, 2};

   std::vector<int*> my_vec;
   int length = sizeof(int_array)/sizeof(int);
   for(int i=0; i < length; ++i) {
      int *int_ptr =new int;
      *int_ptr = int_array[i];
      my_vec.push_back(int_ptr);
   }
   std::sort(my_vec.begin(), my_vec.end(), compare_val);
}
------------ sort_test.cxx---------


---------------- Valgrind output -----------------
= 061== Memcheck, a memory error detector
= 061== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
= 061== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
= 061== Command: ./sort_test
= 061== 061== Invalid read of size 8
= 061==    at 0x40159E: __gnu_cxx::__normal_iterator<int**, std::vector<int*,
std::allocator<int*> > >
std::__unguarded_partition<__gnu_cxx::__normal_iterator<int**,
std::vector<int*, std::allocator<int*> > >, int*, bool (*)(int*,
int*)>(__gnu_cxx::__normal_iterator<int**, std::vector<int*,
std::allocator<int*> > >, __gnu_cxx::__normal_iterator<int**, std::vector<int*,
std::allocator<int*> > >, int*, bool (*)(int*, int*)) (in
/home/awafa/tmp/std_sort_crash/sort_test)
= 061==    by 0x4010B8: void
std::__introsort_loop<__gnu_cxx::__normal_iterator<int**, std::vector<int*,
std::allocator<int*> > >, long, bool (*)(int*,
int*)>(__gnu_cxx::__normal_iterator<int**, std::vector<int*,
std::allocator<int*> > >, __gnu_cxx::__normal_iterator<int**, std::vector<int*,
std::allocator<int*> > >, long, bool (*)(int*, int*)) (in
/home/awafa/tmp/std_sort_crash/sort_test)
= 061==    by 0x400B08: void std::sort<__gnu_cxx::__normal_iterator<int**,
std::vector<int*, std::allocator<int*> > >, bool (*)(int*,
int*)>(__gnu_cxx::__normal_iterator<int**, std::vector<int*,
std::allocator<int*> > >, __gnu_cxx::__normal_iterator<int**, std::vector<int*,
std::allocator<int*> > >, bool (*)(int*, int*)) (in
/home/awafa/tmp/std_sort_crash/sort_test)
= 061==    by 0x40092A: main (in /home/awafa/tmp/std_sort_crash/sort_test)
= 061==  Address 0x4a33a48 is 8 bytes before a block of size 1,024 alloc'd
= 061==    at 0x490459B: operator new(unsigned long)
(vg_replace_malloc.c:220)
= 061==    by 0x401844: __gnu_cxx::new_allocator<int*>::allocate(unsigned
long, void const*) (in /home/awafa/tmp/std_sort_crash/sort_test)
= 061==    by 0x4012C9: std::_Vector_base<int*, std::allocator<int*>
>::_M_allocate(unsigned long) (in /home/awafa/tmp/std_sort_crash/sort_test)
= 061==    by 0x400D5A: std::vector<int*, std::allocator<int*>
>::_M_insert_aux(__gnu_cxx::__normal_iterator<int**, std::vector<int*,
std::allocator<int*> > >, int* const&) (in
/home/awafa/tmp/std_sort_crash/sort_test)
= 061==    by 0x400A73: std::vector<int*, std::allocator<int*>
>::push_back(int* const&) (in /home/awafa/tmp/std_sort_crash/sort_test)
= 061==    by 0x4008E1: main (in /home/awafa/tmp/std_sort_crash/sort_test)