fix: avoid returning view for generic operators

.github/workflows/check-format.yml

@@ -28,7 +28,7 @@ jobs:
         #
         # julia  -e 'using Pkg; Pkg.add(PackageSpec(name="JuliaFormatter", version="0.13.0"))'
         run: |
-          julia  -e 'using Pkg; Pkg.add(PackageSpec(name="JuliaFormatter"))'
+          julia  -e 'using Pkg; Pkg.add(PackageSpec(name="JuliaFormatter", version="1"))'
           julia  -e 'using JuliaFormatter; format(".", verbose=true)'
       - name: Format check
         run: |

.github/workflows/fix-format.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v2
       - name: Install JuliaFormatter and format
         run: |
-          julia  -e 'import Pkg; Pkg.add("JuliaFormatter")'
+          julia  -e 'import Pkg; Pkg.add(PackageSpec(name="JuliaFormatter", version="1"))'
           julia  -e 'using JuliaFormatter; format(".")'
 
       - name: Create Pull Request

Project.toml

@@ -1,7 +1,7 @@
 name = "DynamicExpressions"
 uuid = "a40a106e-89c9-4ca8-8020-a735e8728b6b"
 authors = ["MilesCranmer <[email protected]>"]
-version = "1.10.0"
+version = "1.10.1"
 
 [deps]
 ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"

src/Evaluate.jl

@@ -868,7 +868,7 @@ end
             if N == 1
                 return (cX[tree.feature]), true
             else
-                return selectdim(cX, 1, tree.feature), true
+                return copy(selectdim(cX, 1, tree.feature)), true
             end
         end
     elseif tree.degree == 1