SNOW-747896: Looking at some memory consumption on a client code of the go library it seems that chunk 0 is freed only at the end

[stephane-moreau]

Issue description

looking at file chunk_downloader.go, line 186

		scd.ChunksMutex.Lock()
		if scd.CurrentChunkIndex > 1 {
			scd.Chunks[scd.CurrentChunkIndex-1] = nil // detach the previously used chunk
		}

this leaves chunk of index 0 in the scd.Chunks map up until the end of the statement result processing

Shouldn't thie be changed to

		if scd.CurrentChunkIndex >= 1 {

Configuration

1.6.17

Go version: 1.18

[sfc-gh-dszmolka]

hi, thank you for reporting this issue! we'll take a look.

[sfc-gh-dszmolka]

fixed by #772

[sfc-gh-dszmolka]

fix released with 1.6.20