From: shugo@...
Date: 2015-12-18T23:52:46+00:00
Subject: [ruby-core:72370] [Ruby trunk - Bug #11841] [Rejected] StringIO with read and `nil, ''` arguments broken with enabled frozen string literal

Issue #11841 has been updated by Shugo Maeda.

Status changed from Open to Rejected

deepj # wrote:
> ~~~
> # frozen_string_literal: true
> 
> io = StringIO.new('')
> 
> io.read(*[nil, ''])
> ~~~

The second argument of StringIO#read is a buffer to read, so it shouldn't be frozen.

```
io.read(*[nil, String.new])
```


----------------------------------------
Bug #11841: StringIO with read and `nil, ''` arguments broken with enabled frozen string literal
https://bugs.ruby-lang.org/issues/11841#change-55661

* Author: deepj #
* Status: Rejected
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.3.0dev (2015-12-19 trunk 53195) [x86_64-darwin15]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
----------------------------------------
I'm not sure what behavior is expected here. But the following use case is used in rack (https://github.com/rack/rack/blob/master/test/spec_lint.rb#L496). If frozen string literal is enabled it throws `read': can't modify frozen String (RuntimeError), otherwise nothing.

~~~
# frozen_string_literal: true

io = StringIO.new('')

io.read(*[nil, ''])
~~~





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