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versioninfo()
Julia Version 1.8.5
Commit 17cfb8e65ea (2023-01-08 06:45 UTC)
Platform Info:
OS: Linux (x86_64-linux-gnu)
CPU: 8 × 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-13.0.1 (ORCJIT, tigerlake)
Threads: 1 on 8 virtual cores
installed via JuliaUp
using UUIDs
struct flower
car::Vector{UUID}
house::UUID
end
uidv = [UUIDs.uuid4(), UUIDs.uuid4(), UUIDs.uuid4()]
uid = UUIDs.uuid4()
lettuce = flower(uidv, uid)
@assert typeof(lettuce) == typeof(eval( Meta.parse( string(flower(uidv, uid))))) ## passes
@assert lettuce.car == eval( Meta.parse( string(flower(uidv, uid)))).car ## passes
@assert typeof(lettuce.car) == typeof(eval( Meta.parse( string(flower(uidv, uid)))).car) ## passes
@assert lettuce.house == eval( Meta.parse( string(flower(uidv, uid)))).house ## passes
@assert typeof(lettuce.house) == typeof(eval( Meta.parse( string(flower(uidv, uid)))).house) ## passes
@assert fieldcount(flower) == 2
@assert string(lettuce) == string(eval( Meta.parse( string(flower(uidv, uid))))) ## passess
@assert hash(lettuce.house) == hash(eval( Meta.parse( string(flower(uidv, uid)))).house) ## passes
@assert hash(lettuce.car) == hash(eval( Meta.parse( string(flower(uidv, uid)))).car) ## passes
@assert flower(uidv, uid) == flower(uidv, uid)
@assert flower(uidv, uid) == eval(:(flower(uidv, uid)))
## So they should be identical in every way but
## both comparisons below fail
@assert lettuce == eval( Meta.parse( string(flower(uidv, uid))))
@assert hash(lettuce) == hash(eval( Meta.parse( string(flower(uidv, uid))))) Context: I discovered this problem using JSON3 where deserialisation/serialisation identities failed however could reproduce the issue in without those packages loaded. The same holds for uuid1. This is extremely cursed.
Some more testing yielded that:
cornflakes = string(flower(uidv, uid))
@assert cornflakes == string(flower(uidv, uid)) ## passes
soap = Meta.parse(cornflakes)
@assert soap == Meta.parse(cornflakes) ## passes
@assert eval(soap) == eval(soap) ## Fails
## this also fails
@assert eval(:(flower(UUID[UUID("c473d632-4815-11ee-047b-53ba6f201cba"), UUID("c473d644-4815-11ee-2bf5-01764c9f2b45"), UUID("c473d658-4815-11ee-361c-3d983a147777")], UUID("c4745718-4815-11ee-1ec9-fb22fba57306")))) == eval(:(flower(UUID[UUID("c473d632-4815-11ee-047b-53ba6f201cba"), UUID("c473d644-4815-11ee-2bf5-01764c9f2b45"), UUID("c473d658-4815-11ee-361c-3d983a147777")], UUID("c4745718-4815-11ee-1ec9-fb22fba57306"))))
## while those two pass
@assert eval(:(UUID[UUID("c473d632-4815-11ee-047b-53ba6f201cba"), UUID("c473d644-4815-11ee-2bf5-01764c9f2b45"), UUID("c473d658-4815-11ee-361c-3d983a147777")])) == eval(:(UUID[UUID("c473d632-4815-11ee-047b-53ba6f201cba"), UUID("c473d644-4815-11ee-2bf5-01764c9f2b45"), UUID("c473d658-4815-11ee-361c-3d983a147777")]))
@assert eval(:(UUID("c473d658-4815-11ee-361c-3d983a147777"))) == eval(:(UUID("c473d658-4815-11ee-361c-3d983a147777")))
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