[ruby-core:120120] [Ruby master Bug#20933] Unexpected IO::Buffer::MaskError in IO::Buffer#xor!

[ruby-core:120120] [Ruby master Bug#20933] Unexpected IO::Buffer::MaskError in IO::Buffer#xor!

[agitter (Alexander Gitter) via ruby-core]

Issue #20933 has been reported by agitter (Alexander Gitter).

----------------------------------------
Bug #20933: Unexpected IO::Buffer::MaskError in IO::Buffer#xor!
https://bugs.ruby-lang.org/issues/20933

* Author: agitter (Alexander Gitter)
* Status: Open
* ruby -v: ruby 3.4.0dev (2024-12-06T12:47:35Z master 78614ee900) +PRISM [x86_64-linux]
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
The following script raises `Mask overlaps source buffer! (IO::Buffer::MaskError)` most of the time when running it on my Ubuntu 24.04 machine.
"Most of the time" means this sometimes (20% - 30%) works without issue.
```ruby
a = IO::Buffer.new(1024 * 1024)
b = IO::Buffer.new(1024 * 1024)
a = IO::Buffer.new(1024 * 1024) # Removing this line makes this work much more reliably
a.xor!(b)

```
I'm guessing this is somehow related to these being `MAPPED` buffers - reducing the sizes to 1024 bytes also fixes the problem.



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[ruby-core:120123] [Ruby master Bug#20933] Unexpected IO::Buffer::MaskError in IO::Buffer#xor!

[peterzhu2118 (Peter Zhu) via ruby-core]

Issue #20933 has been updated by peterzhu2118 (Peter Zhu).


Thank you for this bug report. I have a fix here: https://github.com/ruby/ruby/pull/12284

----------------------------------------
Bug #20933: Unexpected IO::Buffer::MaskError in IO::Buffer#xor!
https://bugs.ruby-lang.org/issues/20933#change-110874

* Author: agitter (Alexander Gitter)
* Status: Open
* ruby -v: ruby 3.4.0dev (2024-12-06T12:47:35Z master 78614ee900) +PRISM [x86_64-linux]
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
The following script raises `Mask overlaps source buffer! (IO::Buffer::MaskError)` most of the time when running it on my Ubuntu 24.04 machine.
"Most of the time" means this sometimes (20% - 30%) works without issue.
```ruby
a = IO::Buffer.new(1024 * 1024)
b = IO::Buffer.new(1024 * 1024)
a = IO::Buffer.new(1024 * 1024) # Removing this line makes this work much more reliably
a.xor!(b)

```
I'm guessing this is somehow related to these being `MAPPED` buffers - reducing the sizes to 1024 bytes also fixes the problem.



-- 
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/

[ruby-core:120127] [Ruby master Bug#20933] Unexpected IO::Buffer::MaskError in IO::Buffer#xor!

[agitter (Alexander Gitter) via ruby-core]

Issue #20933 has been updated by agitter (Alexander Gitter).


I just gave your branch a quick test and can confirm it fixes this issue. Thank you!

----------------------------------------
Bug #20933: Unexpected IO::Buffer::MaskError in IO::Buffer#xor!
https://bugs.ruby-lang.org/issues/20933#change-110878

* Author: agitter (Alexander Gitter)
* Status: Open
* ruby -v: ruby 3.4.0dev (2024-12-06T12:47:35Z master 78614ee900) +PRISM [x86_64-linux]
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
The following script raises `Mask overlaps source buffer! (IO::Buffer::MaskError)` most of the time when running it on my Ubuntu 24.04 machine.
"Most of the time" means this sometimes (20% - 30%) works without issue.
```ruby
a = IO::Buffer.new(1024 * 1024)
b = IO::Buffer.new(1024 * 1024)
a = IO::Buffer.new(1024 * 1024) # Removing this line makes this work much more reliably
a.xor!(b)

```
I'm guessing this is somehow related to these being `MAPPED` buffers - reducing the sizes to 1024 bytes also fixes the problem.



-- 
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/