fix: mutation error for Zygote

[MilesCranmer]

No description provided.

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	master	cd69d8d...	master / cd69d8d...
eval/ComplexF32/evaluation	7.32 ± 0.58 ms	7.25 ± 0.63 ms	1.01 ± 0.12
eval/ComplexF64/evaluation	10.8 ± 0.83 ms	10.8 ± 0.98 ms	1 ± 0.12
eval/Float32/derivative	11.7 ± 0.59 ms	11.6 ± 0.56 ms	1.01 ± 0.07
eval/Float32/derivative_turbo	11.8 ± 0.62 ms	11.6 ± 0.5 ms	1.02 ± 0.07
eval/Float32/evaluation	2.72 ± 0.29 ms	2.73 ± 0.27 ms	0.995 ± 0.14
eval/Float32/evaluation_bumper	0.566 ± 0.016 ms	0.567 ± 0.015 ms	0.998 ± 0.039
eval/Float32/evaluation_turbo	0.518 ± 0.029 ms	0.519 ± 0.028 ms	0.998 ± 0.078
eval/Float32/evaluation_turbo_bumper	0.567 ± 0.016 ms	0.568 ± 0.016 ms	0.999 ± 0.039
eval/Float64/derivative	15 ± 1.1 ms	14.9 ± 0.88 ms	1 ± 0.097
eval/Float64/derivative_turbo	14.8 ± 1.1 ms	14.9 ± 0.98 ms	0.995 ± 0.1
eval/Float64/evaluation	3.15 ± 0.33 ms	3.14 ± 0.32 ms	1 ± 0.15
eval/Float64/evaluation_bumper	1.19 ± 0.043 ms	1.18 ± 0.043 ms	1 ± 0.052
eval/Float64/evaluation_turbo	1.02 ± 0.06 ms	1.01 ± 0.063 ms	1 ± 0.087
eval/Float64/evaluation_turbo_bumper	1.19 ± 0.045 ms	1.18 ± 0.042 ms	1.01 ± 0.052
utils/combine_operators/break_sharing	0.0396 ± 0.00053 ms	0.0394 ± 0.00058 ms	1 ± 0.02
utils/convert/break_sharing	26.4 ± 1.8 μs	26.4 ± 1.9 μs	1 ± 0.099
utils/convert/preserve_sharing	0.0981 ± 0.0048 ms	0.0978 ± 0.0051 ms	1 ± 0.072
utils/copy/break_sharing	27.5 ± 1.4 μs	27.1 ± 1.4 μs	1.01 ± 0.072
utils/copy/preserve_sharing	0.0985 ± 0.0049 ms	0.0987 ± 0.005 ms	0.998 ± 0.071
utils/count_constant_nodes/break_sharing	12.3 ± 0.42 μs	12.5 ± 0.62 μs	0.986 ± 0.06
utils/count_constant_nodes/preserve_sharing	0.0851 ± 0.0045 ms	0.0857 ± 0.0049 ms	0.992 ± 0.077
utils/count_depth/break_sharing	13.2 ± 0.49 μs	12.6 ± 0.38 μs	1.05 ± 0.051
utils/count_nodes/break_sharing	11.6 ± 0.43 μs	11.5 ± 0.48 μs	1.01 ± 0.056
utils/count_nodes/preserve_sharing	0.0847 ± 0.0045 ms	0.0856 ± 0.0045 ms	0.989 ± 0.074
utils/get_set_constants!/break_sharing	0.0344 ± 0.0022 ms	0.0328 ± 0.0017 ms	1.05 ± 0.087
utils/get_set_constants!/preserve_sharing	0.175 ± 0.009 ms	0.177 ± 0.0087 ms	0.993 ± 0.071
utils/get_set_constants_parametric	0.0448 ± 0.0024 ms	0.0446 ± 0.0026 ms	1 ± 0.079
utils/has_constants/break_sharing	6.8 ± 0.55 μs	6.54 ± 0.46 μs	1.04 ± 0.11
utils/has_operators/break_sharing	2.54 ± 0.18 μs	2.52 ± 0.18 μs	1.01 ± 0.1
utils/hash/break_sharing	23.2 ± 0.62 μs	23.7 ± 0.66 μs	0.981 ± 0.038
utils/hash/preserve_sharing	0.0975 ± 0.0047 ms	0.098 ± 0.0046 ms	0.994 ± 0.067
utils/index_constant_nodes/break_sharing	24.8 ± 0.77 μs	24.5 ± 0.84 μs	1.01 ± 0.047
utils/index_constant_nodes/preserve_sharing	0.0979 ± 0.0047 ms	0.0974 ± 0.0043 ms	1 ± 0.066
utils/is_constant/break_sharing	7.13 ± 0.49 μs	7.14 ± 0.46 μs	0.998 ± 0.094
utils/simplify_tree/break_sharing	0.163 ± 0.0031 ms	0.159 ± 0.0031 ms	1.02 ± 0.028
utils/simplify_tree/preserve_sharing	0.217 ± 0.0089 ms	0.21 ± 0.0088 ms	1.03 ± 0.061
utils/string_tree/break_sharing	0.463 ± 0.016 ms	0.47 ± 0.019 ms	0.986 ± 0.053
utils/string_tree/preserve_sharing	0.57 ± 0.018 ms	0.582 ± 0.019 ms	0.98 ± 0.046
time_to_load	0.216 ± 0.0023 s	0.222 ± 0.0026 s	0.973 ± 0.015

Memory benchmarks

	master	cd69d8d...	master / cd69d8d...
eval/ComplexF32/evaluation	0.987 k allocs: 2.53 MB	0.975 k allocs: 2.5 MB	1.01
eval/ComplexF64/evaluation	0.996 k allocs: 5.07 MB	0.987 k allocs: 5.03 MB	1.01
eval/Float32/derivative	4.71 k allocs: 17.7 MB	4.61 k allocs: 17.4 MB	1.02
eval/Float32/derivative_turbo	4.5 k allocs: 16.9 MB	4.68 k allocs: 17.6 MB	0.961
eval/Float32/evaluation	0.972 k allocs: 1.27 MB	0.969 k allocs: 1.26 MB	1
eval/Float32/evaluation_bumper	0.303 k allocs: 0.393 MB	0.303 k allocs: 0.393 MB	1
eval/Float32/evaluation_turbo	0.966 k allocs: 1.26 MB	0.966 k allocs: 1.26 MB	1
eval/Float32/evaluation_turbo_bumper	0.303 k allocs: 0.393 MB	0.303 k allocs: 0.393 MB	1
eval/Float64/derivative	4.77 k allocs: 0.0349 GB	4.78 k allocs: 0.035 GB	0.996
eval/Float64/derivative_turbo	4.75 k allocs: 0.0347 GB	4.76 k allocs: 0.0348 GB	0.997
eval/Float64/evaluation	0.993 k allocs: 2.54 MB	1.01 k allocs: 2.59 MB	0.982
eval/Float64/evaluation_bumper	0.303 k allocs: 0.771 MB	0.303 k allocs: 0.771 MB	1
eval/Float64/evaluation_turbo	0.99 k allocs: 2.53 MB	0.981 k allocs: 2.51 MB	1.01
eval/Float64/evaluation_turbo_bumper	0.303 k allocs: 0.771 MB	0.303 k allocs: 0.771 MB	1
utils/combine_operators/break_sharing	4 allocs: 0.953 kB	4 allocs: 0.953 kB	1
utils/convert/break_sharing	2 k allocs: 0.0924 MB	2 k allocs: 0.0924 MB	1
utils/convert/preserve_sharing	2.4 k allocs: 0.161 MB	2.4 k allocs: 0.161 MB	1
utils/copy/break_sharing	2 k allocs: 0.0924 MB	2 k allocs: 0.0924 MB	1
utils/copy/preserve_sharing	2.4 k allocs: 0.161 MB	2.4 k allocs: 0.161 MB	1
utils/count_constant_nodes/break_sharing	4 allocs: 0.953 kB	4 allocs: 0.953 kB	1
utils/count_constant_nodes/preserve_sharing	0.404 k allocs: 0.0696 MB	0.404 k allocs: 0.0696 MB	1
utils/count_depth/break_sharing	4 allocs: 0.953 kB	4 allocs: 0.953 kB	1
utils/count_nodes/break_sharing	4 allocs: 0.953 kB	4 allocs: 0.953 kB	1
utils/count_nodes/preserve_sharing	0.404 k allocs: 0.0696 MB	0.404 k allocs: 0.0696 MB	1
utils/get_set_constants!/break_sharing	0.898 k allocs: 25.2 kB	0.898 k allocs: 25.2 kB	1
utils/get_set_constants!/preserve_sharing	1.7 k allocs: 0.138 MB	1.7 k allocs: 0.138 MB	1
utils/get_set_constants_parametric	1.42 k allocs: 0.0663 MB	1.42 k allocs: 0.0663 MB	1
utils/has_constants/break_sharing	4 allocs: 0.203 kB	4 allocs: 0.203 kB	1
utils/has_operators/break_sharing	4 allocs: 0.203 kB	4 allocs: 0.203 kB	1
utils/hash/break_sharing	0.104 k allocs: 2.52 kB	0.104 k allocs: 2.52 kB	1
utils/hash/preserve_sharing	0.504 k allocs: 0.0711 MB	0.504 k allocs: 0.0711 MB	1
utils/index_constant_nodes/break_sharing	1.67 k allocs: 0.0501 MB	1.67 k allocs: 0.0501 MB	1
utils/index_constant_nodes/preserve_sharing	2.07 k allocs: 0.119 MB	2.07 k allocs: 0.119 MB	1
utils/is_constant/break_sharing	4 allocs: 0.203 kB	4 allocs: 0.203 kB	1
utils/simplify_tree/break_sharing	1.33 k allocs: 0.0436 MB	1.33 k allocs: 0.0436 MB	1
utils/simplify_tree/preserve_sharing	1.58 k allocs: 0.101 MB	1.58 k allocs: 0.101 MB	1
utils/string_tree/break_sharing	11.8 k allocs: 1.04 MB	11.8 k allocs: 1.04 MB	1
utils/string_tree/preserve_sharing	12.2 k allocs: 1.11 MB	12.2 k allocs: 1.11 MB	1
time_to_load	0.159 k allocs: 11.2 kB	0.159 k allocs: 11.2 kB	1