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Segmentation fault over larger arrays

See original GitHub issue

Hi,

I’ve been having issues with running PySR over larger input arrays. For instance, by modifying the input size in the example:

from pysr import pysr, best, get_hof

# Dataset
X = 2*np.random.randn(300000, 8) #changed from (100,5) to (300000, 8)
y = 2*np.cos(X[:, 3]) + X[:, 0]**2 - 2

# Learn equations
equations = pysr(X, y, niterations=5,
        binary_operators=["plus", "mult"],
        unary_operators=["cos", "exp", "sin"])

Results in the following trace output:

      From worker 3:	
      From worker 3:	signal (11): Segmentation fault
      From worker 3:	in expression starting at none:0
      From worker 3:	unknown function (ip: (nil))
      From worker 3:	Allocations: 14006734 (Pool: 14002705; Big: 4029); GC: 14
      From worker 5:	
      From worker 5:	signal (11): Segmentation fault
      From worker 5:	in expression starting at none:0
      From worker 5:	unknown function (ip: (nil))
      From worker 5:	Allocations: 14006758 (Pool: 14002728; Big: 4030); GC: 14
      From worker 4:	
      From worker 4:	signal (11): Segmentation fault
      From worker 4:	in expression starting at none:0
      From worker 4:	unknown function (ip: (nil))
      From worker 4:	Allocations: 14006745 (Pool: 14002716; Big: 4029); GC: 14
Couldn't find equation file!

I have replicated this behaviour across different machines, and for each I am fairly certain I have sufficient resources to hold the data in memory, so it’s not clear to me what the issue is.