From: "nobu (Nobuyoshi Nakada) via ruby-core" <ruby-core@...>
Date: 2026-07-12T10:38:41+00:00
Subject: [ruby-core:126062] [Ruby Bug#22191] `Signal.trap(:EXIT)` exception only shown if `at_exit` also raises

Issue #22191 has been updated by nobu (Nobuyoshi Nakada).


Related bug: when two `END` raise exceptions, the same message is printed multiple times.

```console
$ ruby -e 'END{raise "END1"};END{raise "END2"}'
-e:1:in 'block (2 levels) in <main>': END2 (RuntimeError)
-e:1:in 'block (2 levels) in <main>': END1 (RuntimeError)
-e:1:in 'block (2 levels) in <main>': END2 (RuntimeError)
```
```console
$ ruby -e 'END{raise "END1"};END{raise "END2"};END{raise "END3"}'
-e:1:in 'block (2 levels) in <main>': END3 (RuntimeError)
-e:1:in 'block (2 levels) in <main>': END2 (RuntimeError)
-e:1:in 'block (2 levels) in <main>': END3 (RuntimeError)
-e:1:in 'block (2 levels) in <main>': END1 (RuntimeError)
-e:1:in 'block (2 levels) in <main>': END2 (RuntimeError)
-e:1:in 'block (2 levels) in <main>': END3 (RuntimeError)
```

----------------------------------------
Bug #22191: `Signal.trap(:EXIT)` exception only shown if `at_exit` also raises
https://bugs.ruby-lang.org/issues/22191#change-118062

* Author: Earlopain (Earlopain _)
* Status: Open
* ruby -v: ruby 4.1.0dev (2026-05-29T14:34:40Z master 7a07a54298) +PRISM [x86_64-linux]
* Backport: 3.3: REQUIRED, 3.4: REQUIRED, 4.0: REQUIRED
----------------------------------------
```rb
Signal.trap(:EXIT, proc { raise "foo" })
# No output
```

```rb
Signal.trap(:EXIT, proc { raise "foo" })
at_exit { raise "bar" }
# test.rb:2:in 'block in <main>': bar (RuntimeError)
# test.rb:1:in 'block in <main>': foo (RuntimeError)
```

A bit weird



-- 
https://bugs.ruby-lang.org/
______________________________________________
 ruby-core mailing list -- ruby-core@ml.ruby-lang.org
 To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org
 ruby-core info -- https://ml.ruby-lang.org/mailman3/lists/ruby-core.ml.ruby-lang.org/