Segmentation fault adding a new layer with php-mapscript (4.6beta3)

[Nicol Hermann]

Hi List,
i 'am trying to build a map from the scratch using php-mapscript and the
lastest cvs version.
Whenever i add a new layer with
$Layer = ms_newLayerObj($map);
I receive a segmentation fault.

gdb returns the following.
Is this a bug?

gdb php
GNU gdb 6.3-debian
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details.
This GDB was configured as "i386-linux"...Using host libthread_db
library "/lib/libthread_db.so.1".

(gdb) run test.php
Starting program: /usr/local/bin/php test.php
[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 6289)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16384 (LWP 6289)]
0x4114ea30 in layerObj_new (map=0x41f88008) at mapscript_i.c:410
410         map->layerorder[map->numlayers] = map->numlayers;
(gdb)

Attached a short test-script to reproduce the error

<?
  dl("../bin/php_mapscript_45.so");
  $map = ms_newMapObj('') or die('Unable to open mapfile.');
  $map->web->set ("imagepath","/home/nicol/public_html/mapserver/tmp/");
  $map -> web -> set ("imageurl", "/~nicol/mapserver/tmp/");
  $map -> set ("width", 300);
  $map -> set ("height", 300);  
$map->setExtent(5.86562681198,47.2757873535,15.0398788452,55.0556488037);

  $Layer = ms_newLayerObj($map);  // Line which causes the seg fault
  $Layer -> set("name","test");
  $Layer -> set("status", 1);
  $Layer ->
set("data","/home/nicol/public_html/mapserver/data/brd/brd");
  $Layer -> set("type", MS_LAYER_POLYGON );

  $poClass = ms_newClassObj($Layer);
  $styleObj = ms_newStyleObj($poClass);
  $styleObj -> color -> setRGB ( 192, 192, 192 );
  $styleObj -> outlinecolor -> setRGB ( 0 , 0, 0);
  $poClass -> set("name", "Germany");

  $img = @$map->draw();
  if (FALSE !== $img) {
        $url = $img->saveWebImage();
        $img->free();
        printf("<IMG SRC=%s>\n", $url);
  } else {
        printf ('Error');
  }
?>