[Bug c/52336] New: Change the private field without any warning or error.

[maxim.prohorenko at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52336

             Bug #: 52336
           Summary: Change the private field without any warning or error.
    Classification: Unclassified
           Product: gcc
           Version: 4.6.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: maxim.prohore...@gmail.com


// base
class base
{
public:
  base () : mask_private_with_warning (0), private_with_warning (0) {}

private:
// private union
  union
  {
    struct
    {
      unsigned int private_bit_without_warning : 1;
    };

    unsigned int mask_private_with_warning;
  };

// private field
  unsigned int private_with_warning;
};

class der : public base
{
};

int main (int , char **)
{
  der d;
  d.mask_private_with_warning = 1;
  d.private_with_warning = 1;

  d.private_bit_without_warning = 1; 
#warning "private private_bit_without_warning"

  return 0;
}

// gcc 4.6.2 -Wall -W -Wcast-align -Werror -Wfloat-equal -Wpointer-arith
-Wunused -Wwrite-strings -Wno-long-long -std=gnu++98 -Wuninitialized -Wformat=1
-Wformat-security -Wcast-qual
//--cut---------------


/home/prohorenko/projects/gcc_bug_private/build> make
[100%] Building CXX object CMakeFiles/gcc_bug_private.dir/main.cpp.o
/home/prohorenko/projects/gcc_bug_private/main.cpp:34:2: error: #warning
"private private_bit_without_warning"
/home/prohorenko/projects/gcc_bug_private/main.cpp: In function ‘int main(int,
char**)’:
/home/prohorenko/projects/gcc_bug_private/main.cpp:16: error: ‘unsigned int
base::<anonymous union>::mask_private_with_warning’ is private
/home/prohorenko/projects/gcc_bug_private/main.cpp:30: error: within this
context
/home/prohorenko/projects/gcc_bug_private/main.cpp:20: error: ‘unsigned int
base::private_with_warning’ is private
/home/prohorenko/projects/gcc_bug_private/main.cpp:31: error: within this
context
make[2]: *** [CMakeFiles/gcc_bug_private.dir/main.cpp.o] Error 1
make[1]: *** [CMakeFiles/gcc_bug_private.dir/all] Error 2
make: *** [all] Error 2
*** Failed ***