[postgis-users] Problem with MultiLineString

[Ken Southerland]

This problem occurs on versions...
POSTGIS="1.3.1" GEOS="3.0.0rc4-CAPI-1.3.3" PROJ="Rel. 4.5.0, 22 Oct 2006"
POSTGIS="1.3.2" GEOS="3.0.0-CAPI-1.4.1" PROJ="Rel. 4.6.0, 21 Dec 2007"


The first query gives...

select st_isvalid( st_GeomFromText('MULTILINESTRING((491181.9816 
532686.6037,491209.6059 532664.6521),(491215.9577 
532660.8051,491215.9577 532660.8051))'));

NOTICE:  IllegalArgumentException: Number of points must be 0 or >3
  st_isvalid
------------
  f

... while the second gives...

select st_isvalid( st_GeomFromText('MULTILINESTRING((491181.9816 
532686.6037,491209.6059 532664.6521),(491215.957 532660.8051,491215.9577 
532660.8051))'));

  st_isvalid
------------
  t

...and the only difference between the two is that the first point of 
the second line has an x value of 491215.9577 in the first query and 
491215.957 in the second.  In other words, the last seven is just 
stripped and it works.

What gives here?!  Any ideas?

Ken Southerland