[ruby-core:109067] [Ruby master Bug#18882] File.read cuts off a text file with special characters when reading it on MS Windows

Issue #18882 has been updated by austin (Austin Ziegler).


This is Windows-specific, and there is not an error condition to check for reporting on this.

The distinction between "binary" and "text" mode is simply the way that DOS works (yes, that窶冱 how old this behaviour is), and the definition of text is *essentially* just characters 0x20 to 0x1e. If I remember correctly.

Using `open(filename, 'rb')` is the only way to do this on Windows, and there is no such thing as "text mode" and "binary mode" on any system other than an old DOS-based mechanism.

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Bug #18882: File.read cuts off a text file with special characters when reading it on MS Windows
https://bugs.ruby-lang.org/issues/18882#change-98211

* Author: magynhard (Matthテ、us Johannes Beyrle)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x64-mingw-ucrt]
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
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When using File.read to read a text file (in this case a javascript file) with special characters, the content is cut off at special characters.

It occurs only when running ruby on Windows, tried several versions, including the latest.

Does not occur on Linux or WSL (Windows Subsystem for Linux).

I created a github repo including a test script and the source file as the result inside a file as well:
https://github.com/grob-net4industry/ruby_win_file_bug

---Files--------------------------------
copy_pdfmake.min.js (582 KB)
pdfmake.min.js (1.29 MB)
diff.png (55.9 KB)


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