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As seen in Issue #26, there's are some issues with passing patterns by reference instead of by value. When using the original and passed pattern, values get divided between the two. I went through the pattern files and looked for any pattern arguments, using the
copy
library to do a shallow copy of each pattern so the original pattern will not be affected.Other than
PRef
, this was a pretty broad change as most things seemed like they would benefit a shallow copy, so if any should be kept as a deep copy let me know.