Hi all,

I got a strange problem about collect_common_factors,

the problem can be reproduced by the following example:

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symbol a("a"),b("b"),c("c");

symtab table;

table["a"] = a;

table["b"] = b;

table["c"] = c;

parser reader(table);

ex res = reader("b*((c+c*(1+4*a+2*b+b^2)-c*(1+2*b+b^2)-(1+4*a)*c))-a*(c+c*(1+4*a+2*b+b^2)-c*(1+2*b+b^2)-(1+4*a)*c)");

cout << res << endl;

cout << collect_common_factors(res) << endl;

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the collect_common_factors will throw an error: division by zero.

so is this a bug for collect_common_factors?

Best regards!

Feng