Bug: Crash while editing new SVG file

A simple viewer/inspector for Scalable Vector Graphics files
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Sfiera
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Bug: Crash while editing new SVG file

Post by Sfiera » Sun Jun 10, 2007 2:58 pm

Just had a crash while trying to create a new SVG document. I pasted in the header (xml decl, doctype, svg open tag) from another SVG file and saw an error at the bottom to the effect of "unexpected EOF while parsing." I started to type the closing tag and got through "</", at which point svg Detective changed the error message to "EOF while parsing close tag for svg" and then crashed.

[Crashes aside, I would think it appropriate for svg Detective to provide a basic skeleton (xml decl, doctype, svg open and close tags) when a new document is created.]


I found the following in Console.log:

Code: Select all

2007-06-10 15:46:59.829 svg Detective[8753] parse failed
Parse error (1) Encountered unexpected EOF while parsing tag content on line 5, character 291
2007-06-10 15:47:00.703 svg Detective[8753] parse failed
Parse error (1) Encountered unexpected EOF while parsing tag content on line 5, character 292
2007-06-10 15:47:01.023 svg Detective[8753] parse failed
Parse error (1) Encountered unexpected EOF while parsing close tag for <svg> on line 5, character 293
2007-06-10 15:47:01.203 svg Detective[8753] parse failed
svg Detective(8753,0xa000ed88) malloc: *** vm_allocate(size=4129812480) failed (error code=3)
svg Detective(8753,0xa000ed88) malloc: *** error: can't allocate region
svg Detective(8753,0xa000ed88) malloc: *** set a breakpoint in szone_error to debug
Jun 10 15:47:11 hauteclaire crashdump[8755]: svg Detective crashed
Jun 10 15:47:13 hauteclaire crashdump[8755]: crash report written to: /Users/chpickel/Library/Logs/CrashReporter/svg Detective.crash.log
The CrashReporter report is as follows:

Code: Select all

**********

Host Name:      hauteclaire
Date/Time:      2007-06-10 15:47:02.001 -0400
OS Version:     10.4.9 (Build 8P135)
Report Version: 4

Command: svg Detective
Path:    /Applications/svg Detective.app/Contents/MacOS/svg Detective
Parent:  WindowServer [110]

Version: 1.0b1 (1.0b1)

PID:    8753
Thread: 0

Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x00000006

Thread 0 Crashed:
0   com.apple.CoreFoundation   	0x907cad38 CFHash + 24
1   com.apple.CoreFoundation   	0x907d70b4 __CFSetFindBuckets2 + 148
2   com.apple.CoreFoundation   	0x907d6c24 CFSetAddValue + 220
3   com.apple.CoreFoundation   	0x90818674 _inputStreamScanXMLName + 872
4   com.apple.CoreFoundation   	0x9081a188 parseCloseTag + 92
5   com.apple.CoreFoundation   	0x90819474 parseTag + 528
6   com.apple.CoreFoundation   	0x90817d6c parseXML + 300
7   com.apple.CoreFoundation   	0x908176e8 CFXMLParserParse + 444
8   com.gandreas.svg.detective 	0x000060ec -[GandSVG(XML) parseXML:error:] + 1072
9   com.gandreas.svg.detective 	0x00003fac -[MyDocument setRawSVG:] + 232
10  com.apple.Foundation       	0x92c6c9fc _NSSetObjectValueAndNotify + 136
11  com.apple.Foundation       	0x92c6c728 -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 180
12  com.apple.AppKit           	0x939f5b1c -[NSBinder _setValue:forKeyPath:ofObject:mode:validateImmediately:raisesForNotApplicableKeys:error:] + 300
13  com.apple.AppKit           	0x939f59a4 -[NSBinder setValue:forBinding:error:] + 224
14  com.apple.AppKit           	0x93c694a8 -[NSValueBinder _applyObjectValue:forBinding:canRecoverFromErrors:handleErrors:typeOfAlert:discardEditingCallback:otherCallback:callbackContextInfo:didRunAlert:] + 204
15  com.apple.AppKit           	0x93c69904 -[NSValueBinder applyDisplayedValueHandleErrors:typeOfAlert:canRecoverFromErrors:discardEditingCallback:otherCallback:callbackContextInfo:didRunAlert:] + 496
16  com.apple.AppKit           	0x93c699a4 -[NSValueBinder _applyDisplayedValueIfHasUncommittedChangesWithHandleErrors:typeOfAlert:discardEditingCallback:otherCallback:callbackContextInfo:didRunAlert:] + 100
17  com.apple.AppKit           	0x93c6a3d8 -[NSValueBinder validateAndCommitValueInEditor:editingIsEnding:errorUserInterfaceHandled:] + 460
18  com.apple.AppKit           	0x93c56a88 -[_NSBindingAdaptor _validateAndCommitValueInEditor:editingIsEnding:errorUserInterfaceHandled:bindingAdaptor:] + 164
19  com.apple.AppKit           	0x93c56bd8 -[_NSBindingAdaptor validateAndCommitValueInEditor:editingIsEnding:errorUserInterfaceHandled:] + 288
20  com.apple.AppKit           	0x9388802c -[NSTextView(NSSharing) didChangeText] + 400
21  com.apple.AppKit           	0x93886454 -[NSTextView insertText:] + 1960
22  com.apple.AppKit           	0x93885b08 -[NSKeyBindingManager(NSKeyBindingManager_MultiClients) flushTextForClient:] + 212
23  com.apple.AppKit           	0x93883514 -[NSTSMInputContext interpretKeyEvents:] + 1188
24  com.apple.AppKit           	0x938828a0 -[NSView interpretKeyEvents:] + 64
25  com.apple.AppKit           	0x938826f4 -[NSTextView keyDown:] + 756
26  com.apple.AppKit           	0x937fdfa0 -[NSWindow sendEvent:] + 6424
27  com.apple.AppKit           	0x937a68d4 -[NSApplication sendEvent:] + 4172
28  com.apple.AppKit           	0x9379dd10 -[NSApplication run] + 508
29  com.apple.AppKit           	0x9388e87c NSApplicationMain + 452
30  com.gandreas.svg.detective 	0x00002a58 _start + 760
31  com.gandreas.svg.detective 	0x0000275c start + 48

Thread 1:
0   libSystem.B.dylib          	0x9002c4c8 semaphore_wait_signal_trap + 8
1   libSystem.B.dylib          	0x90030fac pthread_cond_wait + 480
2   com.apple.Foundation       	0x92bea30c -[NSConditionLock lockWhenCondition:] + 68
3   com.apple.AppKit           	0x9383e708 -[NSUIHeartBeat _heartBeatThread:] + 324
4   com.apple.Foundation       	0x92be31a0 forkThreadForFunction + 108
5   libSystem.B.dylib          	0x9002be08 _pthread_body + 96

Thread 0 crashed with PPC Thread State 64:
  srr0: 0x00000000907cad38 srr1: 0x000000000000d030                        vrsave: 0x0000000000000000
    cr: 0x22024228          xer: 0x0000000000000004   lr: 0x00000000907cad30  ctr: 0x00000000907cad20
    r0: 0x00000000907d70b4   r1: 0x00000000bfffdc90   r2: 0x0000000000000008   r3: 0x0000000000000000
    r4: 0x0000000000000000   r5: 0x0000000000000000   r6: 0x00000000bfffdd94   r7: 0x0000000000000003
    r8: 0x0000000000000000   r9: 0x0000000000000018  r10: 0x0000000000000005  r11: 0x0000000000000000
   r12: 0x00000000907cad20  r13: 0x0000000000000000  r14: 0x0000000000000100  r15: 0x0000000000000000
   r16: 0x0000000000000000  r17: 0x0000000000000001  r18: 0x0000000000021418  r19: 0x000000000002134c
   r20: 0x0000000009fcefb0  r21: 0x0000000000021430  r22: 0x00000000bfffdd90  r23: 0x000000000a5006a0
   r24: 0x000000000002186c  r25: 0x0000000000021420  r26: 0x0000000000000000  r27: 0x0000000009ba48d0
   r28: 0x00000000bfffdd94  r29: 0x00000000a07be500  r30: 0x0000000009df81f8  r31: 0x00000000907cad30

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Sfiera
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Joined: Sat Jun 09, 2007 8:05 pm
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Post by Sfiera » Sun Jun 10, 2007 4:04 pm

Also, if I may add--perhaps it's not the best thing to bind the source window's content directly to the source. It would be better if the update was delayed for a second or so after editing stops. That would prevent lots of unnecessary (and often erroneous) parsing.
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gandreas
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Post by gandreas » Sun Jun 17, 2007 6:35 pm

There are some bugs with the NSXML support when it comes to malformed XML (leading to crashes). I'm working on coming up with a better work around (yet still supports back to 10.3.9), but certainly adding a delay between editing and "re-rendering" would help to work around some of them.
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Sfiera
Posts: 5
Joined: Sat Jun 09, 2007 8:05 pm
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Post by Sfiera » Mon Jun 18, 2007 10:07 pm

I am not confident on this, but I believe libxml2 has been present on the system since at least 10.3.9. AppKit is linked to libxml2 on 10.4, so it's probably what NSXML is built against. I've never had trouble with software built against libxml2 (e.g. `xsltproc`) crashing, so it's probably a problem with Apple's code rather than the underlying XML parser.
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