World Age issue when creating QobjEvo

[alastair-marshall]

Bug Description

Hi there, loving the package and initiative but having a problem creating:

coef(p, t) = sin(t)

H_t = QobjEvo(sigmax(), coef)

when I run this on Julia Version 1.11.2 with:

  [13f3f980] CairoMakie v0.12.18
  [6c2fb7c5] QuantumToolbox v0.24.0

as the only two things in my environment

I get this error:

ERROR: MethodError: no method matching isoper(::Type{QuantumObject{SparseMatrixCSC{ComplexF64, Int64}, OperatorQuantumObject, 1}})
The applicable method may be too new: running in world age 28716, while current world is 29759.

Code to Reproduce the Bug

using QuantumToolbox
coef(p, t) = sin(t)

H_t = QobjEvo(sigmax(), coef)

Code Output

ERROR: MethodError: no method matching isoper(::Type{QuantumObject{SparseMatrixCSC{ComplexF64, Int64}, OperatorQuantumObject, 1}})
The applicable method may be too new: running in world age 28716, while current world is 29759.

### Expected Behaviour

Create a QObjEvo

### Your Environment

```shell
QuantumToolbox.jl: Quantum Toolbox in Julia
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
Copyright © QuTiP team 2022 and later.
Current admin team:
    Alberto Mercurio and Yi-Te Huang

Package information:
====================================
Julia              Ver. 1.11.2
QuantumToolbox     Ver. 0.24.0
SciMLOperators     Ver. 0.3.12
LinearSolve        Ver. 2.38.0
OrdinaryDiffEqCore Ver. 1.13.0

System information:
====================================
OS       : macOS (arm64-apple-darwin24.0.0)
CPU      : 12 × Apple M2 Pro
Memory   : 16.0 GB
WORD_SIZE: 64
LIBM     : libopenlibm
LLVM     : libLLVM-16.0.6 (ORCJIT, apple-m2)
BLAS     : libopenblas64_.dylib (ilp64)
Threads  : 1 (on 8 virtual cores)

Additional Context

No response

[alastair-marshall]

I have no way to reproduce this anymore, the issue seems to have gone away after restarting my PC

[albertomercurio]

Ok, good to know that you solved it. I think that it may be related to some compilation cache. The definition of isoper which was apparently missing is already defined here.