From: nagachika00@...
Date: 2014-06-10T17:24:41+00:00
Subject: [ruby-core:63066] [Backport21 - Backport #9575] [Closed] Step with	0 step is buggy

Issue #9575 has been updated by Tomoyuki Chikanaga.

Status changed from Open to Closed
% Done changed from 0 to 100

Applied in changeset r46401.

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merge revision(s) r45207,r45208,r45209,r45210: [Backport #9575]

	* numeric.c: Create var for rb_intern("<=>")
	* numeric.c: Fix Numeric#step with 0 unit [Bug #9575]

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Backport #9575: Step with 0 step is buggy
https://bugs.ruby-lang.org/issues/9575#change-47144

* Author: Marc-Andre Lafortune
* Status: Closed
* Priority: Normal
* Assignee: Yui NARUSE
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I didn't realize that we now allow stepping with a '0' step. It should probably have been mentioned in the NEWS of 2.1.0?

Anyways, couple of bugs with that new feature:

    bn = 1 << 100
    bn.step(by: 0, to: bn).first(2) # => [bn, bn] ok
    bn.step(by: 0).first(2)         # => [bn.to_f, bn.to_f] not ok
    bn.step(by: 0, to: 0).first(2)  # => [] not ok

The corresponding `size` don't all work either:

    bn.step(by: 0) # => Float::INFINITY, ok
    bn.step(by: 0, to: bn).size # => ZeroDivisionError: divided by 0, should be infinity
    bn.step(by: 0, to: 0).size  # => same
    1.step(by:0, to: 42).size   # => same

My patch is almost finished.



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