Как создать объект?

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Почему падает программа при вызове функции g_object_new
в строке
return g_object_new(OM1_MOTHER, NULL);

Program received signal SIGSEGV, Segmentation fault.
In g_type_fundamental () (/usr/lib64/libgobject-2.0.so.0)
#3  0x00007ffff5570b06 in om1_mother_new () at /home/user/om1/mother.c:29
  /home/user/om1/mother.c:29:478:beg:0x7ffff5570b06
At /home/user/om1/mother.c:29
#3  0x00007ffff5570b06 in om1_mother_new () at /home/user/om1/mother.c:29
  /home/user/om1/mother.c:29:478:beg:0x7ffff5570b06

Вот мой код:

main.c

#include "mother.h"

int main (int argc, char *argv[])
{
    Om1Mother *mother = om1_mother_new();
    om1_mother_wash(mother);
    g_clear_object(&mother);
    return 0;
}

mother.h

#ifndef GUARD_MOTHER_H
#define GUARD_MOTHER_H

#include <glib-object.h>

G_BEGIN_DECLS

#define OM1_TYPE_MOTHER (om1_mother_get_type())

// #define G_DECLARE_DERIVABLE_TYPE(ModuleObjName, module_obj_name, MODULE, OBJ_NAME, ParentName)
// #define G_DECLARE_FINAL_TYPE    (ModuleObjName, module_obj_name, MODULE, OBJ_NAME, ParentName)
G_DECLARE_DERIVABLE_TYPE (Om1Mother, om1_mother, OM1, MOTHER, GObject)

#define OM1_MOTHER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), OM1_TYPE_MOTHER, Om1Mother))

struct _Om1MotherClass
{
  GObjectClass parent_class;

  /* Class virtual function fields. */
  void (* wash) (Om1Mother  *self, GError     **error);

  /* Padding to allow adding up to 12 new virtual functions without
   * breaking ABI. */
  gpointer padding[12];
};

/*
 * Method definitions.
 */
Om1Mother *om1_mother_new (void);

G_END_DECLS

#endif // GUARD_MOTHER_H

mother.c

#include <stdio.h>
#include "mother.h"

G_DEFINE_TYPE (Om1Mother, om1_mother, G_TYPE_OBJECT)

static void
om1_mother_wash_real(Om1Mother *self, GError **error)
{
    *error = 0;
    printf("washing\n");
}

static void
om1_mother_init(Om1Mother* self)
{
    printf("Mother was born.\n");
}

static void
om1_mother_class_init(Om1MotherClass* self)
{
    printf("First instance of Mother was created\n");
    self->wash = om1_mother_wash_real;
}

Om1Mother*
om1_mother_new()
{
    return g_object_new(OM1_MOTHER, NULL);
}

void
om1_mother_wash(Om1Mother *self, GError **error)
{
    printf("om1_mother_wash\n");
    Om1MotherClass* klass = OM1_MOTHER_GET_CLASS (self);
    klass->wash(self, error);
}

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