On Jun 30, 2009, at 3:33 PM, Quincey Morris wrote:
On Jun 30, 2009, at 11:34, Ross Carter wrote:
I am receiving crash reports for code that enumerates an array
returned by NSFontManager. The app is garbage-collected.
Chances are someone will recognize the exact problem and jump in
with an explanation, but in case not:
(a) Can you post back-traces from the points of failure
corresponding to the source code?
This one is typical:
Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Codes:
KERN_PROTECTION_FAILURE at 0x0000000000000063 Crashed Thread: 0
Application Specific Information: objc[1622]: garbage collection is ON
Thread 0 Crashed:
0 libobjc.A.dylib 0x917e768c objc_msgSend + 28
1 com.apple.AppKit 0x94d3ef43 -[NSFontManager
availableMembersOfFontFamily:] + 963
2 com.cocomot.Pagehand 0x0003a706 -[CCMFontCollectionsController
fontNamesFamiliesDictionary] + 312
3 com.cocomot.Pagehand 0x0003a1fc -[CCMFontCollectionsController
fontCollectionsArrayForControls] + 60
4 com.cocomot.Pagehand 0x000305fe -[CCMApp init] + 806
5 com.apple.AppKit 0x94b48e03 -[NSCustomObject nibInstantiate] + 315
6 com.apple.AppKit 0x94b297f5 -[NSIBObjectData instantiateObject:] + 259
7 com.apple.AppKit 0x94b28f16 -[NSIBObjectData
nibInstantiateWithOwner:topLevelObjects:] + 297
8 com.apple.AppKit 0x94b1f616 loadNib + 264
9 com.apple.AppKit 0x94b1ef78 +[NSBundle(NSNibLoading)
_loadNibFile:nameTable:withZone:ownerBundle:] + 946
10 com.apple.AppKit 0x94b1ebbb +[NSBundle(NSNibLoading)
loadNibFile:externalNameTable:withZone:] + 171
11 com.apple.AppKit 0x94b1eaf9 +[NSBundle(NSNibLoading)
loadNibNamed:owner:] + 391
12 com.apple.AppKit 0x94b1e7a8 NSApplicationMain + 434
13 com.cocomot.Pagehand 0x00002d66 start + 54
(b) Can you reproduce the problem locally? (That is, are you in a
position to try changes and see if the problem goes away?)
No, I have never seen it happen.
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