BigFloat::log infinite loop?

[mtak-]

When BigFloat::log should give 0.5 or 2.0, it infinite loops (or at least seems to). Precision and rounding mode seem unimportant, but I have been testing with precisions of 64,2048,4096 and RoundingModes of ToZero/ToEven.

Here's some code that does not seem to terminate.

let a = BigFloat::from_str("9.0").unwrap();
let b = BigFloat::from_str("3.0").unwrap();
a.log(&b, 64, RoundingMode::ToEven, &mut Consts::new().unwrap());

[stencillogic]

Thank you for raising the issue. FYI: with rounding mode None bug will not appear.

[stencillogic]

So, this requires new functionality. I created a task for it: #32
Whoever wish to work on it: welcome.