Ruby Issue Tracking System

11/11/2025

07:06 PM Ruby Bug #21680 (Closed): Integer#digits bug starting from Ruby 3.1

```
(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).
sigsys (Math Ieu)

05/02/2025

08:31 AM Ruby Feature #21300 (Open): Suggestion: Method for Array truncation

`#pop(n)` and `#slice!(...)` can be used for truncation, but they both allocate a new array for the deleted elements (unless you do it one at a time with `#pop()`...), which is not always needed.
I propose adding a `#size=` method for... sigsys (Math Ieu)

12/26/2023

11:56 PM Ruby Bug #20091 (Closed): Anonymous block method parameters no longer usable within blocks with ruby 3.3

This used to work on 3.1 and 3.2, but now fails with "anonymous block parameter is also used within block (SyntaxError)":
```
def g = yield
def f(&)
g { g(&) }
end
p f { 123 }
```
And something like this also fails:
... sigsys (Math Ieu)

02/28/2017

10:37 PM Ruby Feature #12901: Anonymous functions without scope lookup overhead

Shyouhei Urabe wrote:
> Math Ieu wrote:
> ...
But it could be enabled on-demand. Say with a magic comment, then all closures created from code of this file would be optimized to not capture everything. I guess there might as well be sp... sigsys (Math Ieu)

02/27/2017

04:18 PM Ruby Feature #12901: Anonymous functions without scope lookup overhead

Would be better if this could be determined automatically, as others have pointed out.
A lot of functional programming languages optimize this away with some form of "lambda lifting".
The shared variables that are not ever reassign... sigsys (Math Ieu)

07/05/2015

11:27 AM Ruby Bug #11335 (Closed): `ruby -r debug` catchpoint problem

With a `test-debug.rb` like this:
~~~
raise 'test'
~~~
And starting the debugger like this:
~~~
ruby -r debug test-debug.rb
~~~
By default, the catchpoint is `StandardError`, but it doesn't work:
~~~
test-debug.rb:1:r... sigsys (Math Ieu)