From: "briantobin (Brian Tobin)" <brian@...>
Date: 2012-10-17T07:27:16+09:00
Subject: [ruby-core:48037] [ruby-trunk - Bug #7175] unpack('M*') changed behavior between patchlevels


Issue #7175 has been updated by briantobin (Brian Tobin).


Second update

I discovered that the Mail gem (https://github.com/mikel/mail) is incorrectly stripping the newline after the "=", which makes it illegal. I'll file a bug there.
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Bug #7175: unpack('M*') changed behavior between patchlevels
https://bugs.ruby-lang.org/issues/7175#change-30905

Author: briantobin (Brian Tobin)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin11.3.0]


I'm seeing an important difference in the output of string.unpack between two patchlevels of ruby 1.9.3. The output of patchlevel 194 is expected, and the output of 286 is unexpected.

--- Console 1 ---
>> RUBY_VERSION
=> "1.9.3"
>> RUBY_PATCHLEVEL
=> 194
>> "foo =3D =".unpack("M*")
=> ["foo = "]

--- Console 2 ---
>> RUBY_VERSION
=> "1.9.3"
>> RUBY_PATCHLEVEL
=> 286
>> "foo =3D =".unpack("M*")
=> ["foo = ="]

Was this a purposeful change? Our code is processing emails with the "quoted printable" encoding. After upgrading to patchlevel 286 we are getting trailing equals signs after decoding. I feel like this is a regression.

Thanks in advance!

Brian


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