Ios – Error: Symbol not found: ___CFObjCIsCollectable

iosiphoneobjective csymbolsxcode

today I was working in xcode when this error showed up on start up of the app, whats wrong with my app?

2012-07-29 19:29:58.682 Champagne Pop[10601:1b03] Error loading
/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn:
dlopen(/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn,
262): Symbol not found: __CFObjCIsCollectable Referenced from:
/System/Library/Frameworks/Security.framework/Versions/A/Security
Expected in:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
in /System/Library/Frameworks/Security.framework/Versions/A/Security
2012-07-29 19:29:58.690 Champagne Pop[10601:1b03] Error loading
/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn:
dlopen(/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn,
262): Symbol not found: __CFObjCIsCollectable Referenced from:
/System/Library/Frameworks/Security.framework/Versions/A/Security
Expected in:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
in /System/Library/Frameworks/Security.framework/Versions/A/Security
2012-07-29 19:29:58.703 Champagne Pop[10601:1b03] Error loading
/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn:
dlopen(/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn,
262): Symbol not found: __CFObjCIsCollectable Referenced from:
/System/Library/Frameworks/Security.framework/Versions/A/Security
Expected in:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
in /System/Library/Frameworks/Security.framework/Versions/A/Security
2012-07-29 19:29:58.710 Champagne Pop[10601:1b03] Error loading
/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn:
dlopen(/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn,
262): Symbol not found: __CFObjCIsCollectable Referenced from:
/System/Library/Frameworks/Security.framework/Versions/A/Security
Expected in:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
in /System/Library/Frameworks/Security.framework/Versions/A/Security

Best Answer

As answered here this is a bug in the iOS simulator but is not a problem when running on the actual device. This bug persists at least through Xcode 4.4.1 and the iOS 5.1 SDK.

Related Solutions

Php – Reference — What does this symbol mean in PHP

Incrementing / Decrementing Operators

++ increment operator

-- decrement operator

Example    Name              Effect
---------------------------------------------------------------------
++$a       Pre-increment     Increments $a by one, then returns $a.
$a++       Post-increment    Returns $a, then increments $a by one.
--$a       Pre-decrement     Decrements $a by one, then returns $a.
$a--       Post-decrement    Returns $a, then decrements $a by one.

These can go before or after the variable.

If put before the variable, the increment/decrement operation is done to the variable first then the result is returned. If put after the variable, the variable is first returned, then the increment/decrement operation is done.

For example:

$apples = 10;
for ($i = 0; $i < 10; ++$i) {
    echo 'I have ' . $apples-- . " apples. I just ate one.\n";
}

Live example

In the case above ++$i is used, since it is faster. $i++ would have the same results.

Pre-increment is a little bit faster because it really increments the variable and after that 'returns' the result. Post-increment creates a special variable, copies there the value of the first variable and only after the first variable is used, replaces its value with second's.

However, you must use $apples--, since first, you want to display the current number of apples, and then you want to subtract one from it.

You can also increment letters in PHP:

$i = "a";
while ($i < "c") {
    echo $i++;
}

Once z is reached aa is next, and so on.

Note that character variables can be incremented but not decremented and even so only plain ASCII characters (a-z and A-Z) are supported.

Stack Overflow Posts:

Understanding Incrementing

Ios – What does this gdb output mean

That is a confirmed bug of the iOS SDK 5 / Simulator - happens as soon as the simulator tries to play sound (from a movie or any other sound source). Do not worry though, it won't be a problem on the actual device.

You mentioned actual reports of users having trouble using your App - those problems are not related / connected to the issue you have posted above.

This issue is filed by Apple under Bug ID# 10555404. I did file a report myself which has finally been identified as a dupe of the mentioned bug id.

The issue currently persists up until and including Xcode Version 4.4.1 (4F1003), iOS SDK 5.1.

Update

This issue is finally fixed within Xcode Version 4.5 (4G182), iOS SDK 6.0.

Note

The issue persists even in Xcode Version 4.5 when used in conjunction with the iOS 5.1 (or lower) simulator.

Best Answer

Related Solutions

Php – Reference — What does this symbol mean in PHP

Ios – What does this gdb output mean

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