[deobfuscate]: FormatException: Unexpected DW_AT value 0x34 #87105
Description
There is a crash in the Crashlytics. The crash is obfuscated.
When I try to deobfuscate the crash using flutter symbolize, getting the following error:
Oops; flutter has exited unexpectedly: "FormatException: Unexpected DW_AT value
0x34".
A crash report has been written to flutter_03.log.
Crash from Crashlytics:
Crashed: com.apple.main-thread
0 Flutter 0x105f39608 (Missing)
1 Flutter 0x105f3aec0 (Missing)
2 UIAccessibility 0x1a0818ea8 -[NSObject(AXPrivCategory) _accessibilityFindAncestor:startWithSelf:findTopmostAncestor:] + 84
3 UIAccessibility 0x1a0818a08 -[NSObject(AXPrivCategory) _accessibilityAncestorIsKindOf:] + 112
4 UIKit 0x1d88c0d74 -[UIViewAccessibility _accessibilityFKAShouldBeProcessed] + 172
5 CoreFoundation 0x18c9f8a40 __NSARRAY_IS_CALLING_OUT_TO_A_BOOL_BLOCK__ + 24
6 CoreFoundation 0x18c9f9670 __NSArrayGetIndexesPassingTest + 524
7 AXCoreUtilities 0x19f45f1cc -[NSArray(AXExtras) ax_filteredArrayUsingBlock:] + 32
8 UIKit 0x1d88c0c00 -[UIViewAccessibility _childFocusRegionsInRect:inCoordinateSpace:] + 1768
9 UIKitCore 0x18f98a850 -[UIView _searchForFocusRegionsInContext:] + 892
10 UIKitCore 0x18eee8108 -[_UIFocusMapSnapshot addRegionsInContainer:] + 196
11 UIKitCore 0x18eee78b0 -[_UIFocusMapSnapshot _capture] + 284
12 UIKitCore 0x18eee6f88 -[_UIFocusMapSnapshot _initWithSnapshotter:mapArea:searchArea:] + 496
13 UIKitCore 0x18eee8f10 -[_UIFocusMapSnapshotter captureSnapshot] + 224
14 UIKitCore 0x18eedf8cc -[_UIFocusMap _defaultFocusItemInEnvironment:limitScopeUsingFocusPreferences:] + 240
15 UIKitCore 0x18eeb46bc -[_UIFocusEnvironmentPreferenceEnumerationContext _inferPreferencesForEnvironment:] + 156
16 UIKitCore 0x18eeb418c -[_UIFocusEnvironmentPreferenceEnumerationContext _resolvePreferredFocusEnvironments] + 132
17 UIKitCore 0x18eeb40c4 -[_UIFocusEnvironmentPreferenceEnumerationContext prefersNothingFocused] + 44
18 UIKitCore 0x18eeb4f44 _enumeratePreferredFocusEnvironments + 192
19 UIKitCore 0x18eeb506c _enumeratePreferredFocusEnvironments + 488
20 UIKitCore 0x18eeb506c _enumeratePreferredFocusEnvironments + 488
21 UIKitCore 0x18eeb506c _enumeratePreferredFocusEnvironments + 488
22 UIKitCore 0x18eeb4d94 -[_UIFocusEnvironmentPreferenceEnumerator enumeratePreferencesForEnvironment:usingBlock:] + 192
23 UIKitCore 0x18eeb56e8 -[_UIDeepestPreferredEnvironmentSearch deepestPreferredFocusableItemForEnvironment:withRequest:] + 728
24 UIKitCore 0x18eefbf14 -[UIFocusUpdateContext _updateDestinationItemIfNeeded] + 236
25 UIKitCore 0x18eefbcbc -[UIFocusUpdateContext _destinationItemInfo] + 32
26 UIKitCore 0x18eefbb70 -[UIFocusUpdateContext nextFocusedItem] + 28
27 UIKitCore 0x18eeeafd0 -[UIFocusSystem updateFocusIfNeeded] + 156
28 UIKitCore 0x18eeea8e0 __37-[UIFocusSystem _requestFocusUpdate:]_block_invoke + 40
29 UIKitCore 0x18f945c98 -[_UIAfterCACommitBlock run] + 72
30 UIKitCore 0x18f4786c4 _runAfterCACommitDeferredBlocks + 300
31 UIKitCore 0x18f46703c _cleanUpAfterCAFlushAndRunDeferredBlocks + 204
32 UIKitCore 0x18f49af10 _afterCACommitHandler + 80
33 CoreFoundation 0x18c9f35e0 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36
34 CoreFoundation 0x18c9ed704 __CFRunLoopDoObservers + 572
35 CoreFoundation 0x18c9edcb0 __CFRunLoopRun + 1052
36 CoreFoundation 0x18c9ed360 CFRunLoopRunSpecific + 600
37 GraphicsServices 0x1a402b734 GSEventRunModal + 164
38 UIKitCore 0x18f468584 -[UIApplication _run] + 1072
39 UIKitCore 0x18f46ddf4 UIApplicationMain + 168
40 Agenda BOA 0x1041d2b7c main + 5 (AppDelegate.swift:5)
41 libdyld.dylib 0x18c6a9cf8 start + 4
Here is the attached flutter_03.log
flutter_03.log
Flutter crash report.
Please report a bug at https://github.com/flutter/flutter/issues.
## command
flutter symbolize -i /Users/appleapple/Downloads/crash.txt -d app.ios-arm64.symbols
## exception
FormatException: FormatException: Unexpected DW_AT value 0x34
#0 _Attribute.fromReader (package:native_stack_traces/src/dwarf.dart:130:7)
#1 Reader.readRepeatedWithOffsets (package:native_stack_traces/src/reader.dart:132:28)
#2 _SyncIterator.moveNext (dart:core-patch/core_patch.dart:183:26)
#3 MappedIterator.moveNext (dart:_internal/iterable.dart:390:19)
#4 new _GrowableList._ofOther (dart:core-patch/growable_array.dart:198:26)
#5 new _GrowableList.of (dart:core-patch/growable_array.dart:152:26)
#6 new List.of (dart:core-patch/array_patch.dart:50:28)
#7 Iterable.toList (dart:core/iterable.dart:388:12)
#8 _Abbreviation.fromReader (package:native_stack_traces/src/dwarf.dart:198:67)
#9 Reader.readRepeatedWithOffsets (package:native_stack_traces/src/reader.dart:132:28)
#10 _SyncIterator.moveNext (dart:core-patch/core_patch.dart:183:26)
#11 MappedIterator.moveNext (dart:_internal/iterable.dart:390:19)
#12 MappedIterator.moveNext (dart:_internal/iterable.dart:390:19)
#13 MapMixin.addEntries (dart:collection/maps.dart:177:23)
#14 new Map.fromEntries (dart:core/map.dart:182:17)
#15 _AbbreviationsTable.fromReader (package:native_stack_traces/src/dwarf.dart:235:31)
#16 Reader.readRepeatedWithOffsets (package:native_stack_traces/src/reader.dart:132:28)
#17 _SyncIterator.moveNext (dart:core-patch/core_patch.dart:183:26)
#18 MapMixin.addEntries (dart:collection/maps.dart:177:23)
#19 new Map.fromEntries (dart:core/map.dart:182:17)
#20 Dwarf._loadSectionsFromElf (package:native_stack_traces/src/dwarf.dart:1221:37)
#21 Dwarf.fromReader (package:native_stack_traces/src/dwarf.dart:1203:18)
#22 Dwarf.fromBytes (package:native_stack_traces/src/dwarf.dart:1210:13)
#23 _defaultTransformer (package:flutter_tools/src/commands/symbolize.dart:121:29)
#24 DwarfSymbolizationService.decode (package:flutter_tools/src/commands/symbolize.dart:177:30)
#25 SymbolizeCommand.runCommand (package:flutter_tools/src/commands/symbolize.dart:108:38)
#26 FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:1275:12)
#27 FlutterCommand.run. (package:flutter_tools/src/runner/flutter_command.dart:1126:27)
#28 AppContext.run. (package:flutter_tools/src/base/context.dart:150:19)
#29 CommandRunner.runCommand (package:args/command_runner.dart:196:13)
#30 FlutterCommandRunner.runCommand. (package:flutter_tools/src/runner/flutter_command_runner.dart:288:9)
#31 AppContext.run. (package:flutter_tools/src/base/context.dart:150:19)
#32 FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:236:5)
#33 run.. (package:flutter_tools/runner.dart:62:9)
#34 AppContext.run. (package:flutter_tools/src/base/context.dart:150:19)
#35 main (package:flutter_tools/executable.dart:92:3)
## flutter doctor
[✓] Flutter (Channel dev, 2.4.0-4.0.pre, on macOS 11.4 20F71 darwin-x64, locale
en-US)
• Flutter version 2.4.0-4.0.pre at /Library/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision cc00e7e (2 weeks ago), 2021-07-11 18:21:02 -0400
• Engine revision ed25e8f
• Dart version 2.14.0 (build 2.14.0-301.0.dev)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
• Android SDK at /Users/appleapple/Library/Android/sdk
• Platform android-30, build-tools 30.0.2
• ANDROID_HOME = /Users/appleapple/Library/Android/sdk
• Java binary at: /Applications/Android
Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 12.5.1, Build version 12E507
• CocoaPods version 1.10.0
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 4.2)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)
[✓] IntelliJ IDEA Community Edition (version 2019.3.3)
• IntelliJ at /Applications/IntelliJ IDEA CE.app
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
[✓] VS Code (version 1.58.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.24.0
[✓] Connected device (2 available)
• XT1562 (mobile) • ZY2224VT7J • android-arm • Android 7.1.1 (API 25)
• Chrome (web) • chrome • web-javascript • Google Chrome
92.0.4515.107
• No issues found!
</details>