[ITensors] [BUG] CI test fails for Julia 1.9 in test/ITensorChainRules/test_chainrules_ops.jl

[JanReimers]

ITensor main branch: CI test fails for Julia 1.9 in test/ITensorChainRules/test_chainrules_ops.jl.
Partial stack dump:

test_rrule: #215 on Float64: Error During Test at /home/janr/.julia/packages/ChainRulesTestUtils/lERVj/src/testers.jl:202
  Got exception outside of a @test
  TypeError: in typeassert, expected Tuple{T, T} where T, got a value of type Tuple{Tangent{Any, NamedTuple{(:which_op, :sites, :params), Tuple{ZeroTangent, ZeroTangent, Tangent{Any, NamedTuple{(:θ,), Tuple{Float64}}}}}}, ZeroTangent}
  Stacktrace:
    [1] _totuple
      @ ./tuple.jl:386 [inlined]
    [2] Tuple
      @ ./tuple.jl:369 [inlined]
    [3] vect_pullback
      @ ~/.julia/packages/ChainRules/aKxNz/src/rulesets/Base/array.jl:41 [inlined]
    [4] (::Zygote.ZBack{ChainRules.var"#vect_pullback#1367"{2}})(dy::Vector{Union{Nothing, NamedTuple{(:which_op, :sites, :params), Tuple{Nothing, Nothing, NamedTuple{(:θ,), Tuple{Float64}}}}}})
      @ Zygote ~/.julia/packages/Zygote/IoW2g/src/compiler/chainrules.jl:205
    [5] Pullback
      @ ~/.julia/dev/ITensors/src/Ops/Ops.jl:188 [inlined]
    [6] (::typeof(∂(+)))(Δ::NamedTuple{(:f, :args, :kwargs), Tuple{Nothing, Tuple{Vector{Union{Nothing, NamedTuple{(:which_op, :sites, :params), Tuple{Nothing, Nothing, NamedTuple{(:θ,), Tuple{Float64}}}}}}}, Nothing}})
      @ Zygote ~/.julia/packages/Zygote/IoW2g/src/compiler/interface2.jl:0
    [7] Pullback
      @ ~/.julia/dev/ITensors/test/ITensorChainRules/test_chainrules_ops.jl:47 [inlined]
    [8] (::typeof(∂(#215)))(Δ::Float64)
      @ Zygote ~/.julia/packages/Zygote/IoW2g/src/compiler/interface2.jl:0
    [9] (::Zygote.var"#ad_pullback#58"{Tuple{var"#215#235", Float64}, typeof(∂(#215))})(Δ::Float64)
      @ Zygote ~/.julia/packages/Zygote/IoW2g/src/compiler/chainrules.jl:257
   [10] macro expansion
      @ ~/.julia/packages/ChainRulesTestUtils/lERVj/src/testers.jl:221 [inlined]
   [11] macro expansion
      @ /opt/julia-1.9.0/share/julia/stdlib/v1.9/Test/src/Test.jl:1498 [inlined]
   [12] test_rrule(::RuleConfig, ::Any, ::Any, ::Vararg{Any}; output_tangent::Any, check_thunked_output_tangent::Any, fdm::Any, rrule_f::Any, check_inferred::Bool, fkwargs::NamedTuple, rtol::Real, atol::Real, testset_name::Any, kwargs::Base.Pairs{Symbol, V, Tuple{Vararg{Symbol, N}}, NamedTuple{names, T}} where {V, N, names, T<:Tuple{Vararg{Any, N}}})
      @ ChainRulesTestUtils ~/.julia/packages/ChainRulesTestUtils/lERVj/src/testers.jl:205
   [13] macro expansion
      @ ~/.julia/dev/ITensors/test/ITensorChainRules/test_chainrules_ops.jl:51 [inlined]

Version information

julia> versioninfo()
Julia Version 1.9.0
Commit 8e630552924 (2023-05-07 11:25 UTC)
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 4 × Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-14.0.6 (ORCJIT, ivybridge)
  Threads: 4 on 4 virtual cores
Environment:
  LD_LIBRARY_PATH = :/usr/local/HDF_Group/HDF5/1.12.1/lib/
  JULIA_EDITOR = code
  JULIA_NUM_THREADS = 4
  JULIA_IMAGE_THREADS = 1

 julia> Pkg.status("ITensors")
Status `~/.julia/environments/v1.9/Project.toml`
  [9136182c] ITensors v0.3.34 `~/.julia/dev/ITensors`

[mtfishman]

Closed by #1135.