QSettings crashes on Mac when trying to read a corrupt plist file.

Process: qsettings_test [40007] 
Path: ./qsettings_test.app/Contents/MacOS/qsettings_test 
Identifier: qsettings_test 
Version: ??? (???) 
Code Type: X86 (Native) 
Parent Process: bash [9715] 

Date/Time: 2010-10-22 21:05:00.850 +0400 
OS Version: Mac OS X 10.5.8 (9L30) 
Report Version: 6 
Anonymous UUID: 2160AA92-5DF6-498C-BA75-6885433E485F 

Exception Type: EXC_BREAKPOINT (SIGTRAP) 
Exception Codes: 0x0000000000000002, 0x0000000000000000 
Crashed Thread: 0 

Application Specific Information: 
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSNull length]: unrecognized selector sent to instance 0xa0420020' 

Thread 0 Crashed: 
0 com.apple.CoreFoundation 0x943dce94 ___TERMINATING_DUE_TO_UNCAUGHT_EXCEPTION___ + 4 
1 libobjc.A.dylib 0x9048be3b objc_exception_throw + 40 
2 com.apple.CoreFoundation 0x943e41ea -[NSObject doesNotRecognizeSelector:] + 186 
3 com.apple.CoreFoundation 0x943e27ec ___forwarding___ + 892 
4 com.apple.CoreFoundation 0x943e28b2 _CF_forwarding_prep_0 + 50 
5 com.apple.CoreFoundation 0x9437a9f7 CFStringGetLength + 215 
6 libQtCorePrl_debug.4.dylib 0x005e6f05 QCFString::toQString(__CFString const*) + 43 
7 libQtCorePrl_debug.4.dylib 0x0058bcb0 qtKey(__CFString const*) + 34 
8 libQtCorePrl_debug.4.dylib 0x0058e9ca QMacSettingsPrivate::children(QString const&, QSettingsPrivate::ChildSpec) const + 234 
9 libQtCorePrl_debug.4.dylib 0x0058dbb7 QMacSettingsPrivate::remove(QString const&) + 115 
10 libQtCorePrl_debug.4.dylib 0x005678d4 QSettings::remove(QString const&) + 214 
11 com.yourcompany.qsettings_test 0x00003c34 main + 2194 (test.cpp:25) 
12 com.yourcompany.qsettings_test 0x00002d2b _start + 209 
13 com.yourcompany.qsettings_test 0x00002c59 start + 41 

Thread 0 crashed with X86 Thread State (32-bit): 
eax: 0xa04210f0 ebx: 0x9048be1c ecx: 0xa04201a0 edx: 0x00008000 
edi: 0xa0457f40 esi: 0xa0420020 ebp: 0xbfffe908 esp: 0xbfffe908 
ss: 0x0000001f efl: 0x00000286 eip: 0x943dce94 cs: 0x00000017 
ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037 
cr2: 0xffe17df8