[ruby-core:123769] [Ruby Bug#21680] Integer#digits bug starting from Ruby 3.1

11 Nov 2025

      Issue #21680 has been reported by sigsys (Math Ieu).

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Bug #21680: Integer#digits bug starting from Ruby 3.1
https://bugs.ruby-lang.org/issues/21680

* Author: sigsys (Math Ieu)
* Status: Open
* ruby -v: ruby 3.3.10 (2025-10-23 revision 343ea05002) [amd64-freebsd14]
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
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```
(2**512).digits(256).last
```

The result was 1 on Ruby 3.0. Starting from Ruby 3.1 it turned to 256 (which can't possibly be right).

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https://bugs.ruby-lang.org/