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I need some help with a cash in Disk Recording framework.

Subject: I need some help with a cash in Disk Recording framework.
From: Vincent Le Normand <email@hidden>
Date: Thu, 31 Jan 2008 18:33:32 +0100
Delivered-to: email@hidden
Delivered-to: email@hidden

Hello,

A customer had a crash i cannot reproduce. I also have no idea of what cause this crash.

My app burn an important number of virtual folders and virtual files, with a coule of real file.

The crash occurs during the DRFilesystemTrackCreate call. It looks like a DRFolderCreateReal is called, and a CFNumberCreate with a NULL value is called, producing a crash. Does anybody have a clue of what can produce this kind of crash?

Here the interesting parts of the crashlog:

OS Version:     10.4.11 (Build 8S165)

Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x00000000

Thread 0 Crashed: 0 <<00000000>> 0xfffeff20 objc_msgSend_rtp + 32 1 com.apple.CoreFoundation 0x907d5c98 CFNumberCreate + 444 2 com.apple.DiscRecordingContent 0x9553b62c DRFolderCreateReal + 2944 3 com.apple.DiscRecordingContent 0x9553b458 DRFolderCreateReal + 2476 4 com.apple.DiscRecordingContent 0x9553b248 DRFolderCreateReal + 1948 5 com.apple.DiscRecordingContent 0x9553b168 DRFolderCreateReal + 1724 6 com.apple.DiscRecordingContent 0x95555988 DRFilesystemTrackCreate + 192 7 pbxutil 0x00019740 PBXBurnObject::burnCD(__DRBurn*) + 152

Thread 3: 0 libSystem.B.dylib 0x9000b348 mach_msg_trap + 8 1 libSystem.B.dylib 0x9000b29c mach_msg + 60 2 com.apple.CoreFoundation 0x907de9b8 __CFRunLoopRun + 832 3 com.apple.CoreFoundation 0x907de2bc CFRunLoopRunSpecific + 268 4 com.apple.CoreFoundation 0x907ed71c CFRunLoopRun + 52 5 com.apple.DiscRecordingEngine 0x95488a90 DRCDTextBlockGetTypeID + 4880 6 com.apple.DiscRecordingEngine 0x9548897c DRCDTextBlockGetTypeID + 4604 7 com.apple.DiscRecordingEngine 0x95488214 DRCDTextBlockGetTypeID + 2708 8 com.apple.DiscRecordingEngine 0x954e56c4 _DRWorkLoopThread + 0 9 libSystem.B.dylib 0x9002bd08 _pthread_body + 96

Thread 0 crashed with PPC Thread State 64: srr0: 0x00000000fffeff20 srr1: 0x100000000200f030 vrsave: 0x0000000000000000 cr: 0x44000288 xer: 0x0000000000000000 lr: 0x00000000907d5c98 ctr: 0xfffffffffffeff00 r0: 0x00000000907d5c98 r1: 0x00000000bffff0a0 r2: 0x0000000000000000 r3: 0x0000000000338a40 r4: 0x0000000090aacaa0 r5: 0x00000000000003e8 r6: 0xffffffffffffffff r7: 0x0000000001030301 r8: 0x000000007a6c6b79 r9: 0x00000000a07c4854 r10: 0x0000000000000004 r11: 0x000000006f54caa0 r12: 0x000000000466312b r13: 0x0000000000060000 r14: 0x0000000000000000 r15: 0x0000000000000000 r16: 0x0000000000000000 r17: 0x0000000000000000 r18: 0x0000000000000000 r19: 0x0000000000000000 r20: 0x0000000000060000 r21: 0x0000000005466e00 r22: 0x000000000161ea40 r23: 0x0000000000060000 r24: 0x000000000030c320 r25: 0x00000000bffff830 r26: 0x0000000000000000 r27: 0x0000000090895ae4 r28: 0x0000000000000004 r29: 0x00000000bffff150 r30: 0x0000000000338a40 r31: 0x00000000907d5ae4

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