I'm working on an application which is nearing completion, but I'm
getting these strange crashes that look to be deep in the cocoa
framework. The thing is, I can't seem to diagnose these crashes, and
I can't imagine that such bugs exist in the framework such that they
pull down my application so frequently. So, I'm assuming it is
something I'm doing. I am using garbage collection, and I'm getting
an EXC_BAD_ACCESS error. And at least one crash that pops up every so
often is below. It stops on the following line of code of the init
method (#6 below) in my PrintView class:
NSFont *font = [NSFont fontWithName:@"Lucida Grande" size:fontSize];
#0 0x931ad644 in CFDictionaryGetValue
#1 0x901f4fb8 in TDescriptor::CreateMatchingDescriptorInternal
#2 0x901f4e1c in TDescriptor::InitBaseFont
#3 0x901f4d94 in TDescriptor::CreateMatchingDescriptor
#4 0x921d48ec in __NSFontFactoryWithName
#5 0x921d466c in +[NSFont fontWithName:size:]
#6 0x0005e2e0 in -[PrintView
initWithScopeDeduction:andHelper:andDeductionController:] at
PrintView.m:32
#7 0x00006a8c in -[MyDocument printOperationWithSettings:error:] at
MyDocument.m:441
#8 0x9241bde8 in -[NSDocument
_printDocumentWithSettings:showPrintPanel:delegate:didPrintSelector:contextInfo
:]
#9 0x9241bce0 in -[NSDocument
printDocumentWithSettings:showPrintPanel:delegate:didPrintSelector:contextInfo
:]
#10 0x921f58b8 in -[NSApplication sendAction:to:from:]
#11 0x922911d0 in -[NSMenu performActionForItemAtIndex:]
#12 0x92290f00 in -[NSCarbonMenuImpl
performActionWithHighlightingForItemAtIndex:]
#13 0x92290bc8 in -[NSMenu performKeyEquivalent:]
#14 0x9228f6ac in -[NSApplication _handleKeyEquivalent:]
#15 0x921c5d84 in -[NSApplication sendEvent:]
#16 0x92132e44 in -[NSApplication run]
#17 0x92103820 in NSApplicationMain
#18 0x00015bf8 in main at main.m:13
fontSize is valid. If I look into local variables, I get "_name"
being "invalid". But if there is a problem with the name, that would
be strange, since it works most of the time. Any ideas as to how I
can diagnose this problem? I also have seemingly random crashes of
this sort when the "open file" dialogue is opened. Thanks,
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