In the Prisma engines, shouldn’t a null serialisation error be returned if a query has no items to return and is not optional? I have a feeling this is is a case of simply forgetting a negation and that the second

&& opt

should be

&& !opt

. The potential mistake is

query-engine/core/src/response_ir/internal.rs

line 267

Hey Brendan 👋 I see that you have already created an issue in the prisma engines repository: #2979 Our engineering team should respond to you on the issue.