collect() eats fractions

[Pearu Peterson]

Hi!

In ginsh (ginac V0.8.0):

> x/(1+x);
(1+x)^(-1)*x
> collect(x/(1+x),x);
0                           <----???
> collect(1+x/(1+x),x);
1                           <----???
> collect(x+x/(1+x),x);
(1+(1+x)^(-1))*x

Is this GiNaC bug or feature?

Pearu

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