From: "postmodern (Hal Brodigan)" <noreply@...>
Date: 2022-05-09T10:36:31+00:00
Subject: [ruby-core:108491] [Ruby master Bug#18766] ArgumentError with no backtrace when requiring openssl/cipher and initializing an OpenSSL::Cipher

Issue #18766 has been reported by postmodern (Hal Brodigan).

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Bug #18766: ArgumentError with no backtrace when requiring openssl/cipher and initializing an OpenSSL::Cipher
https://bugs.ruby-lang.org/issues/18766

* Author: postmodern (Hal Brodigan)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-linux]
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------
I discovered a mysterious ArgumentError when requiring 'openssl/cipher' instead of 'openssl' and initializing a OpenSSL::Cipher object. The ArgumentError does not indicate where the exception is being raised from.

## Steps To Reproduce

```
ruby -r openssl/cipher -e "p OpenSSL::Cipher.new('aes-256-cbc')"
```

## Expected Result

```
#<OpenSSL::Cipher:0x000055a5424cef68>
```

## Actual Result

```
Traceback (most recent call last):
	2: from -e:1:in `<main>'
	1: from -e:1:in `new'
-e:1:in `initialize': wrong number of arguments (given 1, expected 0) (ArgumentError)
```

## Effected Versions

Can reproduce this bug using ruby-2.7 and ruby-3.1.



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