ERROR:  Operation on mixed SRID geometries
t2|SRID=10;GEOMETRYCOLLECTION(MULTILINESTRING((0 0,10 0)),MULTILINESTRING EMPTY)
t3|GEOMETRYCOLLECTION(MULTILINESTRING EMPTY,MULTILINESTRING((0 0,10 0)))
t4|GEOMETRYCOLLECTION(MULTILINESTRING EMPTY,MULTILINESTRING EMPTY)
t5|GEOMETRYCOLLECTION(MULTILINESTRING((20 0,30 0)),MULTILINESTRING((70 0,80 0)))
ERROR:  GEOSSharedPaths: IllegalArgumentException: Geometry is not lineal
t7|GEOMETRYCOLLECTION(MULTILINESTRING((4 2,7 2)),MULTILINESTRING((14 7,11 6)))
t8|GEOMETRYCOLLECTION(MULTILINESTRING((4 2,7 2)),MULTILINESTRING((14 7,11 6)))