From: "k0kubun (Takashi Kokubun) via ruby-core" <ruby-core@...>
Date: 2025-01-15T01:43:10+00:00
Subject: [ruby-core:120678] [Ruby master Bug#20873] `printf("%f")` returns wrong result for `Rational` with `FIXNUM_MIN`

Issue #20873 has been updated by k0kubun (Takashi Kokubun).

Backport changed from 3.1: REQUIRED, 3.2: DONE, 3.3: REQUIRED to 3.1: REQUIRED, 3.2: DONE, 3.3: DONE

ruby_3_3 commit:1ec258ab7002210670171f3f2f0c4b39657e24a4 merged revision(s) commit:d71be7274bd2623bb521be72c245c08fc38d6ae4.

----------------------------------------
Bug #20873: `printf("%f")` returns wrong result for `Rational` with `FIXNUM_MIN`
https://bugs.ruby-lang.org/issues/20873#change-111501

* Author: nobu (Nobuyoshi Nakada)
* Status: Closed
* Assignee: nobu (Nobuyoshi Nakada)
* Backport: 3.1: REQUIRED, 3.2: DONE, 3.3: DONE
----------------------------------------
Since the beginning, ruby 2.3.

```ruby
require 'rbconfig/sizeof'
fmin, fmax = RbConfig::LIMITS.values_at("FIXNUM_MIN", "FIXNUM_MAX")
sprintf("%f", Rational(fmin, fmax)) #=> --1.000000
```




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