WIP - avoid crash if chunk is nil

Author: radeksimko

internal/plugin6/grpc_provider.go

@@ -1516,7 +1516,10 @@ func (p *GRPCProvider) ReadStateBytes(r providers.ReadStateBytesRequest) (resp p
 		chunk, err := client.Recv()
 		if err == io.EOF {
 			// End of stream, we're done
-			resp.Diagnostics = resp.Diagnostics.Append(convert.ProtoToDiagnostics(chunk.Diagnostics))
+			if chunk != nil {
+				// TODO: The EOF error could be just returned alongside the last chunk?
+				resp.Diagnostics = resp.Diagnostics.Append(convert.ProtoToDiagnostics(chunk.Diagnostics))
+			}
 			break
 		}
 		if err != nil {