[#114181] [Ruby master Bug#19767] [Not really a bug, but more a not ideal notification] "historical binary regexp match" when using the "n" modifier in a ruby regex — "rubyFeedback (robert heiler) via ruby-core" <ruby-core@...>
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3 messages
2023/07/14
[ruby-core:114294] [Ruby master Bug#19784] String#delete_prefix! problem
From:
duerst via ruby-core <ruby-core@...>
Date:
2023-07-26 09:25:15 UTC
List:
ruby-core #114294
Issue #19784 has been updated by duerst (Martin D=FCrst).
I agree that `start_with?` and `delete_prefix!` should probably be aligned.=
But in general, encoding problems should lead to early errors, not be defe=
rred.
----------------------------------------
Bug #19784: String#delete_prefix! problem
https://bugs.ruby-lang.org/issues/19784#change-103992
* Author: inversion (Yura Babak)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux]
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
----------------------------------------
Here is the snipped and the question is in the comments:
``` ruby
fp =3D 'with_BOM_16.txt'
body =3D File.read(fp).force_encoding('UTF-8')
p body # "\xFF\xFE1\u00001\u0000"
p body.start_with?("\xFF\xFE") # true
body.delete_prefix!("\xFF\xFE") # !!! why doesn't work?
p body # "\xFF\xFE1\u00001\u0000"
p body.start_with?("\xFF\xFE") # true
body[0, 2] =3D ''
p body # "1\u00001\u0000"
p body.start_with?("\xFF\xFE") # false
```
Works same=20
on Linux (ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux])
and Windows (ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x64-mingw-ucrt])
--=20
https://bugs.ruby-lang.org/
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