Ruby Issue Tracking System

10/23/2026

02:31 PM Ruby Bug #22467 (Closed): IO#readpartial can raise EFAULT during GC.compact in another thread

This was observed in a test suite that calls GC.compact before forking. A thread doing socket.readpartial(512) in a loop died with Errno::EFAULT: Bad address, in ~10% of runs. After dropping the GC.compact, the error was no longer produc... Confusion (Ivo Wever)

04/01/2021

07:25 PM Ruby Bug #17772 (Rejected): Performance issue with NameError message in context with large instance variables (not caused by did_you_mean)

The following script takes about 2 seconds (tested on 2.6.6 and 2.7.2) to get from 'rescue' to 'ensure' on my machine, when executed as `ruby --disable-did_you_mean script.rb`. The time is taken by getting the `e.message`.
```
class ... Confusion (Ivo Wever)

08/03/2019

12:29 AM Ruby Revision a375a451 (git): [bundler/bundler] Correct default cache path

The default cache path is `vendor/cache`, not `vendor/bundle`.
https://github.com/bundler/bundler/commit/49256bb3d2 Confusion (Ivo Wever)

03/25/2011

08:12 PM Ruby Bug #4525: Exponential performance when summing Enumerable

=begin
Shoot, misclicked the preview and no ability to edit original submission? A better formatted version:
When you sum an Enumerable (using .inject(:+) or in a more verbose fashion), 1.8.7 and 1.9.2 show exponential performance, wh... Confusion (Ivo Wever)

08:09 PM Ruby Bug #4525 (Closed): Exponential performance when summing Enumerable

=begin
When you sum an Enumerable (using .inject(:+) or in a more verbose fashion), 1.8.7 and 1.9.2 show exponential performance, where JRuby and Rubinius show the expected linear behavior.
class A
attr_accessor :foo
def initi... Confusion (Ivo Wever)