Code stalls when adaptive time stepping is requested for a non-adaptive method.

Describe the bug 🐞

When adaptive time stepping is explicitly required via adaptive = true in combination with a non-adatpive method, the code will stall.

Expected behavior

I would expect that an error is thrown, which states that adaptive = true cannot be used together with a non-adatpive method.

Minimal Reproducible Example 👇

using OrdinaryDiffEq
f(u, p, t) = 1.01 * u
u0 = 1 / 2
tspan = (0.0, 1.0)
prob = ODEProblem(f, u0, tspan);

solve(prob, Euler(); dt = 0.1, adaptive=true)

Environment (please complete the following information):

Output of using Pkg; Pkg.status()

Status `~/.julia/environments/v1.10/Project.toml`
  [6e4b80f9] BenchmarkTools v1.5.0
⌃ [e30172f5] Documenter v1.2.1
  [89b67f3b] ExcelFiles v1.0.0
⌅ [c04bee98] ExcelReaders v0.11.0
⌃ [98e50ef6] JuliaFormatter v1.0.45
⌃ [7ed4a6bd] LinearSolve v2.22.1
⌃ [1dea7af3] OrdinaryDiffEq v6.68.0
⌃ [91a5bcdd] Plots v1.39.0
  [d1b20bf0] PositiveIntegrators v0.1.11 `~/Schreibtisch/Code/PositiveIntegrators.jl`
⌃ [295af30f] Revise v3.5.13
⌃ [90137ffa] StaticArrays v1.9.4

Output of using Pkg; Pkg.status(; mode = PKGMODE_MANIFEST)

Status `~/.julia/environments/v1.10/Manifest.toml`
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⌅ [ec485272] ArnoldiMethod v0.2.0
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⌃ [2a0fbf3d] CPUSummary v0.2.4
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⌃ [944b1d66] CodecZlib v0.7.3
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⌃ [5ae59095] Colors v0.12.10
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⌃ [4d8831e6] OpenSSL v1.4.1
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⌃ [1dea7af3] OrdinaryDiffEq v6.68.0
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⌃ [995b91a9] PlotUtils v1.4.0
⌃ [91a5bcdd] Plots v1.39.0
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  [1d0040c9] PolyesterWeave v0.2.1
  [d1b20bf0] PositiveIntegrators v0.1.11 `~/Schreibtisch/Code/PositiveIntegrators.jl`
⌃ [d236fae5] PreallocationTools v0.4.17
⌃ [aea7be01] PrecompileTools v1.2.0
⌃ [21216c6a] Preferences v1.4.1
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⌃ [731186ca] RecursiveArrayTools v3.4.0
⌃ [f2c3362d] RecursiveFactorization v0.2.21
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  [05181044] RelocatableFolders v1.0.1
  [ae029012] Requires v1.3.0
⌃ [295af30f] Revise v3.5.13
⌃ [7e49a35a] RuntimeGeneratedFunctions v0.5.12
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⌃ [0bca4576] SciMLBase v2.16.3
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Output of versioninfo()

Julia Version 1.10.0
Commit 3120989f39b (2023-12-25 18:01 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 8 × Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-15.0.7 (ORCJIT, skylake)
  Threads: 1 on 8 virtual cores

SciML / OrdinaryDiffEq.jl

Code stalls when adaptive time stepping is requested for a non-adaptive method. #2265