[Valgrind-users] uninitialized value error with packed structure

[David L <id...@gm...>]

With this code:


#include <stdio.h>

class MyClass {
public:
  short int foo_ : 6;
};

int main(int argc, char *argv[]) {
  MyClass *gce = new MyClass();
  double d=0.0;
  if (d == 0.0) {
    printf("d equals zero.\n");
  }
  return 0;
}

I get this output from valgrind:


==32293== Conditional jump or move depends on uninitialised value(s)
==32293==    at 0x804862F: main (main.cpp:11)
==32293==  Uninitialised value was created by a heap allocation
==32293==    at 0x400674E: operator new(unsigned int) (vg_replace_malloc.c:224)
==32293==    by 0x8048610: main (main.cpp:9)

If I remove the : 6 from foo_, I don't get the error.  Is this a valgrind bug?

Thanks,

              David