From 2c6181cd2a43bedb42378b200a0024263f277e43 Mon Sep 17 00:00:00 2001
From: JamesWrigley <james@puiterwijk.org>
Date: Sun, 29 Mar 2026 20:10:33 +0200
Subject: [PATCH 1/2] Run integration tests in a temporary environment

This avoids making ChainRulesCore a dependency of the downstream package, which
can cause Aqua failures.
---
 .github/workflows/IntegrationTest.yml | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/.github/workflows/IntegrationTest.yml b/.github/workflows/IntegrationTest.yml
index 154d4bd..36b435b 100644
--- a/.github/workflows/IntegrationTest.yml
+++ b/.github/workflows/IntegrationTest.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   test:
-    name: ${{ matrix.package.repo }}
+    name: ${{ matrix.package.name }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -15,12 +15,12 @@ jobs:
         julia-version: [1]
         os: [ubuntu-latest]
         package:
-          - {user: JuliaDiff, repo: ChainRulesTestUtils.jl}
-          - {user: JuliaDiff, repo: ChainRules.jl}
-          - {user: JuliaMath, repo: SpecialFunctions.jl}
-          - {user: invenia, repo: BlockDiagonals.jl}
-          - {user: invenia, repo: PDMatsExtras.jl}
-          - {user: PumasAI, repo: DataInterpolations.jl}
+          - {user: JuliaDiff, name: ChainRulesTestUtils}
+          - {user: JuliaDiff, name: ChainRules}
+          - {user: JuliaMath, name: SpecialFunctions}
+          - {user: JuliaArrays, name: BlockDiagonals}
+          - {user: invenia, name: PDMatsExtras}
+          - {user: SciML, name: DataInterpolations}
 
     steps:
       - uses: actions/checkout@v4
@@ -28,21 +28,22 @@ jobs:
         with:
           version: ${{ matrix.julia-version }}
           arch: x64
+      - uses: julia-actions/cache@v3
       - uses: julia-actions/julia-buildpkg@latest
       - name: Clone Downstream
         uses: actions/checkout@v4
         with:
-          repository: ${{ matrix.package.user }}/${{ matrix.package.repo }}
+          repository: ${{ matrix.package.user }}/${{ matrix.package.name }}.jl
           path: downstream
       - name: Load this and run the downstream tests
-        shell: julia --project=downstream {0}
+        shell: julia --project=@temp {0}
         run: |
           using Pkg
           try
             # force it to use this PR's version of the package
-            Pkg.develop(PackageSpec(path="."))  # ResolverError with main deps may be thrown here
+            Pkg.develop([PackageSpec(path="."), PackageSpec(path="downstream")])  # ResolverError with main deps may be thrown here
             Pkg.update()
-            Pkg.test()  # ResolverError with test deps may be thrown here (before test process starts)
+            Pkg.test("${{ matrix.package.name }}")  # ResolverError with test deps may be thrown here (before test process starts)
           catch err
             err isa Pkg.Resolve.ResolverError || rethrow()
             # If we can't resolve that means this is incompatible by SemVer and this is fine

From 06b333bb3b81ae562399adeb7e6c6812670642b9 Mon Sep 17 00:00:00 2001
From: JamesWrigley <james@puiterwijk.org>
Date: Sun, 29 Mar 2026 12:05:32 +0200
Subject: [PATCH 2/2] Add compat for ChainRulesCore v2

---
 Project.toml   | 4 ++--
 test/to_vec.jl | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/Project.toml b/Project.toml
index a0a1ebc..929bd68 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "FiniteDifferences"
 uuid = "26cc04aa-876d-5657-8c51-4c34ba976000"
-version = "0.12.33"
+version = "0.12.34"
 
 [deps]
 ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
@@ -12,7 +12,7 @@ SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 
 [compat]
-ChainRulesCore = "0.10.3, 1"
+ChainRulesCore = "0.10.3, 1, 2"
 LinearAlgebra = "<0.0.1, 1"
 Printf = "<0.0.1, 1"
 Random = "<0.0.1, 1"
diff --git a/test/to_vec.jl b/test/to_vec.jl
index 9de188d..774ab4c 100644
--- a/test/to_vec.jl
+++ b/test/to_vec.jl
@@ -190,7 +190,7 @@ end
             if T == Float64
                 test_to_vec((a=5, b=randn(10, 11), c=(5, 4, 3)); check_inferred = VERSION ≥ v"1.2")
             else
-                test_to_vec((a=3 + 2im, b=randn(T, 10, 11), c=(5+im, 2-im, 1+im)); check_inferred = VERSION ≥ v"1.2")
+                test_to_vec((a=3 + 2im, b=randn(T, 10, 11), c=(5+im, 2-im, 1+im)); check_inferred = v"1.2" <= VERSION < v"1.12")
             end
         end
         @testset "Dictionary" begin