ST_Segmentize crashes with empty geometry collections

[robe]

SELECT ST_Segmentize(ST_GeomFromText('GEOMETRYCOLLECTION EMPTY'), 0.5);

Breaks on both 1.4 and 1.5 on my PostgreSQL 8.4 windows install. Though I don't have a 1.3 handy to test.

[strk]

Try this:

Index: liblwgeom/lwcollection.c =================================================================== --- liblwgeom/lwcollection.c (revision 4541) +++ liblwgeom/lwcollection.c (working copy) @@ -321,7 +321,7 @@

unsigned int i; LWGEOM **newgeoms;

- if ( ! col->ngeoms ) return col; + if ( ! col->ngeoms ) return lwcollection_clone(col);

newgeoms = lwalloc(sizeof(LWGEOM *)*col->ngeoms); for (i=0; i<col->ngeoms; i++)

[strk]

Suggested patch

[strk]

Committed togheter with regression test in r4542.

[robe]

backported to branck 1.4 -- r4545 (didn't bother backporting the regress test).