fix: non-finite .val evaluation issue

[MilesCranmer]

Should fix MilesCranmer/PySR#759 by @GoldenGoldy

This also includes a test that randomly generates trees and fills their .val with Inf or NaN. This test failed before this fix (which is bad!) but now passes.

[github-actions]

Pull Request Test Coverage Report for Build 12141411622

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 95.32%

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Totals
Change from base Build 11733401928:	0.0%
Covered Lines:	2424
Relevant Lines:	2543

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💛 - Coveralls

[github-actions]

Benchmark Results

	master	a035f4b...	master/a035f4bfcb2cce...
eval/ComplexF32/evaluation	7.32 ± 0.58 ms	7.24 ± 0.6 ms	1.01
eval/ComplexF64/evaluation	10.8 ± 0.98 ms	10.7 ± 0.85 ms	1.01
eval/Float32/derivative	11.7 ± 1 ms	11.6 ± 1.1 ms	1.01
eval/Float32/derivative_turbo	11.7 ± 1.1 ms	11.6 ± 1.1 ms	1.01
eval/Float32/evaluation	2.79 ± 0.27 ms	2.77 ± 0.25 ms	1.01
eval/Float32/evaluation_bumper	0.609 ± 0.015 ms	0.607 ± 0.015 ms	1
eval/Float32/evaluation_turbo	0.573 ± 0.034 ms	0.566 ± 0.036 ms	1.01
eval/Float32/evaluation_turbo_bumper	0.61 ± 0.014 ms	0.608 ± 0.015 ms	1
eval/Float64/derivative	15.2 ± 0.77 ms	15.5 ± 0.96 ms	0.98
eval/Float64/derivative_turbo	15 ± 0.64 ms	14.9 ± 0.63 ms	1.01
eval/Float64/evaluation	3.21 ± 0.32 ms	3.17 ± 0.32 ms	1.01
eval/Float64/evaluation_bumper	1.26 ± 0.044 ms	1.27 ± 0.048 ms	0.993
eval/Float64/evaluation_turbo	1.05 ± 0.071 ms	1.05 ± 0.07 ms	1
eval/Float64/evaluation_turbo_bumper	1.26 ± 0.046 ms	1.27 ± 0.046 ms	0.995
utils/combine_operators/break_sharing	0.0386 ± 0.00068 ms	0.0386 ± 0.0006 ms	0.999
utils/convert/break_sharing	27.7 ± 2.8 μs	26.9 ± 2.5 μs	1.03
utils/convert/preserve_sharing	0.0988 ± 0.0042 ms	0.0986 ± 0.0042 ms	1
utils/copy/break_sharing	28 ± 2.5 μs	27.6 ± 2.6 μs	1.01
utils/copy/preserve_sharing	0.0994 ± 0.0045 ms	0.1 ± 0.0042 ms	0.991
utils/count_constant_nodes/break_sharing	8.88 ± 0.22 μs	8.34 ± 0.21 μs	1.06
utils/count_constant_nodes/preserve_sharing	0.0862 ± 0.0033 ms	0.0836 ± 0.0036 ms	1.03
utils/count_depth/break_sharing	9.57 ± 0.23 μs	9.86 ± 0.26 μs	0.972
utils/count_nodes/break_sharing	8.44 ± 0.2 μs	8.59 ± 0.2 μs	0.983
utils/count_nodes/preserve_sharing	0.085 ± 0.0032 ms	0.0856 ± 0.0034 ms	0.992
utils/get_set_constants!/break_sharing	0.0329 ± 0.0024 ms	0.0341 ± 0.0022 ms	0.964
utils/get_set_constants!/preserve_sharing	0.179 ± 0.0069 ms	0.178 ± 0.0061 ms	1
utils/get_set_constants_parametric	0.0448 ± 0.0029 ms	0.0443 ± 0.0024 ms	1.01
utils/has_constants/break_sharing	4.1 ± 0.15 μs	4.24 ± 0.14 μs	0.967
utils/has_operators/break_sharing	1.96 ± 0.069 μs	2.26 ± 0.063 μs	0.87
utils/hash/break_sharing	22.6 ± 0.67 μs	22.9 ± 1 μs	0.986
utils/hash/preserve_sharing	0.0973 ± 0.0039 ms	0.0972 ± 0.0039 ms	1
utils/index_constant_nodes/break_sharing	24.6 ± 1.1 μs	25.2 ± 0.89 μs	0.977
utils/index_constant_nodes/preserve_sharing	0.0991 ± 0.004 ms	0.0998 ± 0.0039 ms	0.993
utils/is_constant/break_sharing	4.42 ± 0.16 μs	3.83 ± 0.14 μs	1.15
utils/simplify_tree/break_sharing	0.179 ± 0.0033 ms	0.166 ± 0.0032 ms	1.08
utils/simplify_tree/preserve_sharing	0.231 ± 0.0063 ms	0.217 ± 0.0062 ms	1.06
utils/string_tree/break_sharing	0.468 ± 0.017 ms	0.464 ± 0.018 ms	1.01
utils/string_tree/preserve_sharing	0.576 ± 0.026 ms	0.576 ± 0.02 ms	1
time_to_load	0.239 ± 0.0019 s	0.233 ± 0.0031 s	1.03