Select from array slices doesn't work

Kuba Ober (winnie@mika.fr.eu.org) reports a bug with a severity of 2
The lower the number the more severe it is.

Short Description
Select from array slices doesn't work

Long Description
When I try to select from array slices it gives strange qrPgSql error. Normal array indexing works, but slices don't.

Sample Code

create table temp (arr varchar(20)[])

OK

select arr[1:2] from temp

Error: qrPgSql: Parameter '2' not found

select arr[1] from temp

OK

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