[#100284] [Ruby master Bug#17211] Test failures in ruby2.7.2 and ruby3.0~preview1 — utkarsh@...

Issue #17211 has been reported by utkarsh (Utkarsh Gupta).

10 messages 2020/10/02

[#100301] [Ruby master Feature#17215] Backport for arm64 optimizations that exist for power/x86 — jaruga@...

Issue #17215 has been reported by jaruga (Jun Aruga).

10 messages 2020/10/05

[#100329] [Ruby master Bug#17220] Rails Active Job integration test fails with Ruby 3.0.0 since 2038cc6cab6ceeffef3ec3a765c70ae684f829ed — yasuo.honda@...

Issue #17220 has been reported by yahonda (Yasuo Honda).

28 messages 2020/10/07

[#100332] [Ruby master Bug#17221] Relax the Fiber#transfer's limitation — ko1@...

Issue #17221 has been reported by ko1 (Koichi Sasada).

15 messages 2020/10/07

[#100348] [Ruby master Bug#17257] Integer#pow(0, 1) returns 1, which is incorrect — universato@...

Issue #17257 has been reported by universato (Yoshimine Sato).

13 messages 2020/10/09

[#100371] [Ruby master Feature#17260] Promote pattern matching to official feature — kazuki@...

Issue #17260 has been reported by ktsj (Kazuki Tsujimoto).

10 messages 2020/10/11

[#100383] [Ruby master Feature#17261] Software transactional memory (STM) for Threads and Ractors — ko1@...

Issue #17261 has been reported by ko1 (Koichi Sasada).

14 messages 2020/10/12

[#100401] [Ruby master Bug#17263] Fiber context switch degrades with number of fibers, limit on number of fibers — ciconia@...

Issue #17263 has been reported by ciconia (Sharon Rosner).

14 messages 2020/10/15

[#100422] [CommonRuby Feature#17265] Add `Bool` module — marcandre-ruby-core@...

Issue #17265 has been reported by marcandre (Marc-Andre Lafortune).

11 messages 2020/10/19

[#100466] [Ruby master Feature#17273] shareable_constant_value pragma — ko1@...

Issue #17273 has been reported by ko1 (Koichi Sasada).

14 messages 2020/10/21

[#100471] [Ruby master Feature#17277] Make Enumerator#with_index yield row and col indices for Matrix — grzegorz.jakubiak@...

Issue #17277 has been reported by greggzst (Grzegorz Jakubiak).

8 messages 2020/10/21

[#100479] [Ruby master Feature#17278] On-demand sharing of constants for Ractor [email protected]

Issue #17278 has been reported by Dan0042 (Daniel DeLorme).

13 messages 2020/10/21

[#100534] [Ruby master Feature#17284] Shareable Proc — ko1@...

Issue #17284 has been reported by ko1 (Koichi Sasada).

16 messages 2020/10/25

[#100597] [Ruby master Feature#17288] Optimize __send__ call with a literal method name — muraken@...

Issue #17288 has been reported by mrkn (Kenta Murata).

13 messages 2020/10/27

[#100669] [Ruby master Feature#17295] Feature: Create a directory and file with Pathname#touch — get.codetriage@...

Issue #17295 has been reported by schneems (Richard Schneeman).

9 messages 2020/10/30

[#100673] [Ruby master Feature#17298] Ractor's basket communication APIs — ko1@...

Issue #17298 has been reported by ko1 (Koichi Sasada).

15 messages 2020/10/30

[#100675] [Ruby master Misc#17299] DevelopersMeeting20201120Japan — mame@...

Issue #17299 has been reported by mame (Yusuke Endoh).

11 messages 2020/10/31

[ruby-core:100546] [Ruby master Bug#16518] Should we rationalize Rational's numerator automatically?

From: muraken@...
Date: 2020-10-26 03:44:16 UTC
List: ruby-core #100546
Issue #16518 has been updated by mrkn (Kenta Murata).

Status changed from Open to Assigned

I'm working on it at https://github.com/ruby/ruby/pull/3702

----------------------------------------
Bug #16518: Should we rationalize Rational's numerator automatically?
https://bugs.ruby-lang.org/issues/16518#change-88173

* Author: st0012 (Stan Lo)
* Status: Assigned
* Priority: Normal
* Assignee: mrkn (Kenta Murata)
* ruby -v: 2.6.5
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
In this [Rails issue](https://github.com/rails/rails/issues/38041) we found that using `BigDecimal` as a `Rational`'s numerator can have inconsistent behaviors when the denominator gets bigger. For example:

```
> 1 == BigDecimal(1)
=> true
> Rational(1, 1) == Rational(BigDecimal(1), 1)
=> true
> Rational(1, 6) == Rational(BigDecimal(1), 6)
=> true
> Rational(1, 60) == Rational(BigDecimal(1), 60)
=> false
```


So my question is, is this behavior expected? 
If it's not expected, do we have a plan to fix it?
If it is, does it make sense to manually rationalize the numerator before passing it into the `Rational` call, in order to get a consistent result?



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