Comment #8 on issue 1680 by asmeurer: Infinite recursion in cos (and other trigonometric functions) http://code.google.com/p/sympy/issues/detail?id=1680
The problem with different architectures is that Python's hash() function gives different results for hashable objects on different architectures. We sort .args by hash value when it is commutative, so any routine that could give a different result for differently ordered hashes will work differently on different architectures. So for example, if a routine like could_extract_minus_sign() does something like remove the minus sign from the first element of the .args, then it will work differently depending on if (x - y).args is (x, y) or (y, x). Quite often this is buried and can be hard to trace. The easiest way to debug it is to get two machines, one for which it works and one for which it doesn't, and then step through on each with a debugger until something is different. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to sympy-issues@googlegroups.com To unsubscribe from this group, send email to sympy-issues+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en -~----------~----~----~----~------~----~------~--~---
