Hi, I'm running into an odd failure in the PyObjC test suite that is probably caused by a bug in OC_PythonUnicode in the pyobjc-core project. The relevant code looks fine though, and I have no idea what's going on here and would really appriciate if someone that knows Objective-C (and the Python C API) could have a look at the code.
In particular, with the following script:
<quote>
import Cocoa
# Create Cocoa string:
s = Cocoa.CFStringCreateMutableCopy(None, 0, b"****foobar****".decode('ascii'))
# Use this as a Cocoa object, instead of using the unicode subclass that's by
default used for wrapping
s = s.nsstring()
trim_chars = u"*"
#trim_chars = Cocoa.CFStringCreateWithCString(None, trim_chars,
Cocoa.kCFStringEncodingASCII)
Cocoa.CFStringTrim(s, trim_chars)
print (s)
</quote>
This script prints an unexpected value (the "*" characters are not stripped on
both sides), but works fine when the line that translates trim_chars in a Cocoa
string is activated.
For me te problem only occurs when I run this code with a 64-bit build of
python ("arch -x86_64 python2.7 ...") and works fine in a 32-bit build ("arch
-i386 python2.7 ..."). I have only tested on OSX 10.7, I'm currently traveling
and cannot easily test on other releases. To make life even more interesting,
the problem only occurs when "PyObjC_UNICODE_FAST_PATH" is active.
It is best to use the version of PyObjC that is in my bitbucket repository to
reproduce the problem (http://bitbucket.org/ronaldoussoren/pyobjc). You will
have to change Modules/objc/pyobjc.h, I have for now disabled
PyObjC_UNICODE_FAST_PATH unconditionally to avoid this problem.
The relevant, failing, code is in Modules/objc/OC_PythonUnicode.m. This is a
subclass of NSString that is used to proxy Python unicode strings into the
Objective-C world. I've already tried disabling the implementation of
"-getCharacters:range" and that didn't help.
Ronald
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