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).