Two things. First, order of operations is not what I would expect:
your first code is equivalent to
sage: 1 << (3 + 1.2).
Note that
sage: (1 << 3) + 1.2
9.20000000000000
works.
Secondly, the reason the second example works is that you can shift by
an integer n, and
it just multiplies by 2^n (before 2.4 I think it had to be a positive
integer). If you want to be able
to shift by arbitrary real values then change the code for __lshift__
and __rshift__ for the reals.
David
On Mar 25, 11:24 pm, "didier deshommes" <[EMAIL PROTECTED]> wrote:
> This is strange: SAGE crashes on input that mixes shifting and mpfr
> reals
> {{{
> sage: # mpz, mpfr
> sage: 1<<3 +1.2
> Segmentation fault
>
> }}}
>
> But note that this is fine:
> {{{
> # mpfr, mpz
> sage: 2.0 + 1<<3
> 24.0000000000000
>
> }}}
>
> Anyone knows what's happening?
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