Purify'ing my bison. Desperate for HELP! PLEASE!!!

[Billy Patton]

I've got a yacc that I'm getting complaints about form Purify.
This is on a Sun Solaris 7 UNix box.

I have something this:
object_tag        :  OBJECT qstring
                     {
                       char   *name = my_string_storage(NULL,$2);
                       cell_p cell  = cell_malloc(NULL);
                       #ifdef LAFF_YACC_PRINT
                       printf("line# : %d : object_tag
'%s'\n",linenum,name);
                       #endif
                       $$ = node_malloc(lOBJECT,name);
                       if(current_lib[0] NE '\0') {
                         node_t *np = node_malloc(lLIB,current_lib);
                         np->child = $$;
                         cell->head = np;
                       }
                       else {
                         cell->head = $$;
                       }
                       cell->name = name;
                       if (! add_cell_pointer(db,cell))
                       {
                         lERROR;
                         printf("add_cell_pointer : failed to add cell
\"%s\""
                                         " in ReadLaff\n",name);
                               YYERROR;
                       }
                     }
                     object_data ')'
                     {
                       $$ = $<nptr>3;
                     }
                  ;

object_data       : /* optional */
                    { $$ = NULL }
                  | '(' ')'
                    { $$ = NULL; }
                  | '(' object_children ')'
                    { $$ = $2; }
                  ;

object_children   : object_child
                    {
                     yyvsp[-2].nptr->child = $1;
                     $1->parent = yyvsp[-2].nptr;
                    }
                  | object_children object_child
                    {
                      $1->sibling = $2;
                      $2->parent = yyvsp[-3].nptr;
                      $$ = $2;
                    }
                  ;

object_child      : attr_tag  
                  ;

attr_tag          : ATTR qstring
                    {
                      #ifdef LAFF_YACC_PRINT
                      printf("line# : %d : attr_tag '%s'\n",linenum,$2);
                      #endif
                      $$ = node_malloc(lATTR,$2);
                    }
                    attr_data ')'
                    {
                      $$ = $<nptr>3;
                    }
                  ;

attr_data         : /* optional */
                    { $$ = NULL; }
                  | '(' attr_children ')'
                    { $$ = $2; }
                  ;

attr_children     : attr_child
                    {
                      yyvsp[-2].nptr->child = $1;
                      $1->parent = yyvsp[-2].nptr;
                    }
                  | attr_children attr_child
                    {
                      $1->sibling = $2;
                      $2->parent = yyvsp[-3].nptr;
                      $$ = $2;
                    }
                  ;

attr_child        : text_tag 
                  ;

text_tag          : TEXT qstring
                    {
                      #ifdef LAFF_YACC_PRINT
                      printf("line# : %d : text_tag %s\n",linenum,$2);
                      #endif
                      $$ = node_malloc(lTEXT,$2);
                    }
                    text_data ')'
                    {
                      $$ = $<nptr>3;
                    }
                  ;

text_data         : /* optional */
                    { $$ = NULL; }
                  | '(' text_children ')'
                    { $$ = $2; }
                  ;

text_children     : geometric_tag
                    {
                      yyvsp[-2].nptr->child = $1;
                      $1->parent = yyvsp[-2].nptr;
                    }
                  | text_children geometric_tag
                    {
                      $1->sibling = $2;
                      $2->parent = yyvsp[-3].nptr;
                      $$ = $2;
                    }
                  ;



HERE IS MY DATA:
;LAFF
(OBJECT 'BARINFO' (
(ATTR 'UNITS' (
    (TEXT '0.001 MICRONS')))
  (ATTR 'LAYERS' (
    (TEXT ' 1 1 1 1 1 MET1')))))


Notice I ahve 5 places where memory is allocated.
OBJECT, 2 ATTR's and 2 TEXT

A link list is built from this grammer.
I can build the list manually to test my free routine.
Purify complains of no problems.  But when I run the data
through this yacc I get memory leask from the cell_malloc
and 


MLK: 16040 bytes leaked at 0x154008
  * This memory was allocated from:
        malloc         [rtlib.o]
        cell_malloc    [cell.c:24]
        yylaffparse    [laff.y:202] ->object_tag
        laff_read      [laff_db.c:348]
        t_cell_smash   [TEST.c:2549]
        main           [TEST.c:3013]

MLK: 40 bytes leaked in 2 blocks
  * This memory was allocated from:
        malloc         [rtlib.o]
        node_malloc    [node.c:18]
        yylaffparse    [laff.y:820]  ->attr_tag
        laff_read      [laff_db.c:348]
        t_cell_smash   [TEST.c:2549]
        main           [TEST.c:3013]
  * Block of 20 bytes (2 times); last block at 0x158230

MLK: 40 bytes leaked in 2 blocks
  * This memory was allocated from:
        malloc         [rtlib.o]
        node_malloc    [node.c:18]
        yylaffparse    [laff.y:784] -> text_tag
        laff_read      [laff_db.c:348]
        t_cell_smash   [TEST.c:2549]
        main           [TEST.c:3013]
  * Block of 20 bytes (2 times); last block at 0x158358

MLK: 20 bytes leaked at 0x157f08
  * This memory was allocated from:
        malloc         [rtlib.o]
        node_malloc    [node.c:18]
        yylaffparse    [laff.y:206]  -> object_tag
        laff_read      [laff_db.c:348]
        t_cell_smash   [TEST.c:2549]
        main           [TEST.c:3013]

I noticed that as each $$=..  in the *.tab.c that
yyval.nptr is assigned a value.

It almost looks like $$ is duplicated when it
is returned and not free'd.

I'm sure the problem is in my code, but I just can't
see it. 

CAN SOMEONE PLEASE HELP

dragon 60 % bison --version
GNU Bison version 1.25

dragon 62 % uname -a
SunOS dragon 5.7 Generic_106541-14 sun4u sparc SUNW,Ultra-5_10

dragon 63 % gcc -v
Reading specs from
/usr/local/lib/gcc-lib/sparc-sun-solaris2.7/2.8.1/specs
gcc version 2.8.1