[postgis-devel] [PostGIS] #1874: ST_LocateAlong chokes on some value combinations

[PostGIS]

#1874: ST_LocateAlong chokes on some value combinations
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 Reporter:  arho     |       Owner:  pramsey      
     Type:  defect   |      Status:  new          
 Priority:  medium   |   Milestone:  PostGIS 2.0.1
Component:  postgis  |     Version:  2.0.x        
 Keywords:           |  
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 ST_LocateAlong produces an error or even resets the connection on some
 value combinations:

 '''Works:'''[[BR]]
 SELECT ST_AsText(ST_Locatealong(ST_GeomFromText('MULTILINESTRING M ((50 50
 1, 60 60 200), (1 2 3, 3 4 2, 9 4 3), (1 2 3, 5 4 5))'), 105));[[BR]]
 Result: ''MULTIPOINT M (55.2261306532663 55.2261306532663 105)''

 '''Produces an error:'''[[BR]]
 SELECT ST_AsText(ST_Locatealong(ST_GeomFromText('MULTILINESTRING M ((1 2
 3, 3 4 2, 9 4 3), (1 2 3, 5 4 5), (50 50 1, 60 60 200))'), 105));[[BR]]
 ERROR: ''Multipoint cannot contain Invalid type element''

 '''Resets the connection:'''[[BR]]
 SELECT ST_AsText(ST_Locatealong(ST_GeomFromText('MULTILINESTRING M ((1 2
 3, 5 4 5), (50 50 1, 60 60 200))'), 105));[[BR]]
 ''The connection to the server was lost. Attempting reset: Failed.''

 '''Version information:'''
 POSTGIS="2.0.0 r9605" GEOS="3.3.2-CAPI-1.7.2" PROJ="Rel. 4.7.1, 23
 September 2009" GDAL="GDAL 1.9.0, released 2011/12/29" LIBXML="2.7.8"
 RASTER[[BR]]
 PostgreSQL 9.1.2 on i686-pc-linux-gnu, compiled by gcc-4.6.real (Debian
 4.6.2-4) 4.6.2, 32-bit

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/1874>
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