| daniel added a comment. |
In T92961#2579283, @Pfps wrote:Well I think that it should be a breaking change, but I read the stable interface policy as saying that it isn't. Well-behaved consumers are supposed to be tolerant of extra information. Adding a new item to the dump array is adding extra information. This extra information does not change the meaning of the existing information in any way.
I would definitely treat it as a breaking change, but you are right that the policy isn't very clear about that. The reason I think it is breaking is that if we have a concept of "list of X", you can't add a Y to it (if Y is not an X) without breaking the format. Adding an incompatible Y to the list means that the list is no longer homogenous. In my mind, that changes the interpretation. But I'll add a note-to-self to clarify this point. Thanks!
Cc: Pfps, aude, Smalyshev, Ricordisamoa, Addshore, Lydia_Pintscher, adrianheine, JanZerebecki, daniel, Tobi_WMDE_SW, Aklapper, D3r1ck01, Izno, Wikidata-bugs, Mbch331
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