Panic in CloseStream

[cedws]

greptimedb-ingester-go/client.go

Lines 271 to 282 in 1109766

	// CloseStream closes the stream. Once we’ve finished writing our client’s requests to the stream
	// using client.StreamWrite or client.StreamWriteObject, we need to call client.CloseStream to let
	// GreptimeDB know that we’ve finished writing and are expecting to receive a response.
	func (c *Client) CloseStream(ctx context.Context) (*gpb.AffectedRows, error) {
	resp, err := c.stream.CloseAndRecv()
	if err != nil {
	return nil, err
	}
	c.stream = nil
	return resp.GetAffectedRows(), nil
	}

CloseStream may attempt to use c.stream when it is nil, which happens if a stream has not previously been written to.

[evenyag]

Thanks for your report, this should be a bug. Would you be interested in submitting a PR to fix it? @cedws

[cedws]

Sorry, I just wanted to try out Greptime. I probably won't spend time on this.

[evenyag]

#37 should fix this.