Re: [Rubycocoa-talk] Binary strings under Lion

[demallien <dem...@ma...>]

Hi Duncan,

I think you might be alone on this one - it may be time to move to MacRuby!

As an interim workaround, you could try creating your own Objective-C wrapper class for NSData where you can verify that inputs coming from Ruby are what you expect.

Allison

On 01 Aug, 2011,at 09:26 PM, Duncan McGregor <du...@on...> wrote:

Lion seems to have fundamentally broken RubyCocoa marshalling of
binary data for me - viz :

DESCRIPTION OF PROBLEM

On Lion I cannot create NSData objects from RubyCocoa if any of the
bytes have their top bit set.

STEPS TO REPRODUCE

The following code runs fine on 10.5 and 10.6, but segfaults in Lion
(you can just paste it into an irb prompt).

require 'osx/cocoa'
include OSX
byte = 128
bytes = [byte].pack('i_1')
NSData.dataWithBytes_length(bytes, bytes.length)

10.6 gives #<OSX::NSConcreteData:0x801bf550 class='NSConcreteData'
id=0x1013df110>
10.7 gives /System/Library/Frameworks/RubyCocoa.framework/Resources/ruby/osx/objc/oc_wrapper.rb:50:
[BUG] Segmentation fault
ruby 1.8.7 (2010-01-10 patchlevel 249) [universal-darwin11.0]

NOTES AND ATTACHMENTS

The code runs fine on 10.5 and 10.6
The code runs fine on 10.7 where byte < 128.
The segfault happens on 10.7 if any of the bytes in the bytes string is > 127
The segfault also occurs when using CFDataCreate(0, bytes,
bytes.length), NSData.dataWithRubyString, NSData.alloc.init*,
NSMutableData.* - in fact, every way that I've tried to create an
NSData, leading me to believe that the something very fundamental in
the marshalling of strings as binary data is hosed.

Has anyone else run into this issue, or am I the only person with who
had a live RubyCocoa app?

Cheers

Duncan McGregor

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