Developing QScintilla based application then crashes

JackMyson · 28 Jun 2023, 12:16

I'm currently using QScintilla to develop my own text editor. However, after the application is closed as in the normal way (clicking the top-left corner of the window in macOS), the apple debugger has reported the application as crashes, as follow:

-------------------------------------
Translated Report (Full Report Below)
-------------------------------------

Process:               StormText [96334]
Path:                  /Users/USER/*/StormText.app/Contents/MacOS/StormText
Identifier:            org.BrightSoftwareFoundation.StormText
Version:               ???
Code Type:             X86-64 (Native)
Parent Process:        qtcreator_processlauncher [95102]
User ID:               501

Date/Time:             2023-06-28 19:34:16.7778 +0800
OS Version:            macOS 13.4 (22F66)
Report Version:        12
Anonymous UUID:        4566117B-6536-0C74-6A7F-07A965E31605

Sleep/Wake UUID:       8587F755-37EC-46D9-A3B9-918C8F2D72A7

Time Awake Since Boot: 220000 seconds
Time Since Wake:       6638 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000180
Exception Codes:       0x0000000000000001, 0x0000000000000180

Termination Reason:    Namespace SIGNAL, Code 11 Segmentation fault: 11
Terminating Process:   exc handler [96334]

VM Region Info: 0x180 is not in any region.  Bytes before following region: 140737488346752
      REGION TYPE                    START - END         [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      UNUSED SPACE AT START
--->  
      shared memory            7fffffffe000-7ffffffff000 [    4K] r-x/r-x SM=SHM  

Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   libqscintilla2_qt6.15.2.0.dylib	       0x10529a894 QsciDocument::isModified() const + 4
1   StormText                     	       0x104d21a0f BrStormTextMainWindow::handleTabChanged(int) + 223
2   QtCore                        	       0x107cb275a 0x107bf5000 + 776026
3   QtWidgets                     	       0x1062dbac0 0x1060b1000 + 2271936
4   QtCore                        	       0x107cb275a 0x107bf5000 + 776026
5   QtWidgets                     	       0x1062bc251 QTabBar::removeTab(int) + 913
6   QtWidgets                     	       0x1062dbb01 0x1060b1000 + 2272001
7   QtCore                        	       0x107cb275a 0x107bf5000 + 776026
8   QtWidgets                     	       0x1062b6847 0x1060b1000 + 2119751
9   QtCore                        	       0x107cb275a 0x107bf5000 + 776026
10  QtWidgets                     	       0x1060f44de QStackedLayout::takeAt(int) + 446
11  QtWidgets                     	       0x1060f04e5 QLayout::removeWidget(QWidget*) + 85
12  StormText                     	       0x104d21b2b BrStormTextMainWindow::closeFile(bool) + 75
13  QtCore                        	       0x107cb275a 0x107bf5000 + 776026
14  QtGui                         	       0x1058ddb2d QAction::activate(QAction::ActionEvent) + 397
15  QtCore                        	       0x107caa906 QObject::event(QEvent*) + 598
16  QtWidgets                     	       0x1060be367 QApplicationPrivate::notify_helper(QObject*, QEvent*) + 247
17  QtWidgets                     	       0x1060bf18c QApplication::notify(QObject*, QEvent*) + 508
18  QtCore                        	       0x107c6373a QCoreApplication::notifyInternal2(QObject*, QEvent*) + 170
19  QtCore                        	       0x107c6490c QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) + 1468
20  libqcocoa.dylib               	       0x105d11166 0x105cf9000 + 98662
21  libqcocoa.dylib               	       0x105d11b9d 0x105cf9000 + 101277
22  CoreFoundation                	    0x7ff81c82bf2a __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
23  CoreFoundation                	    0x7ff81c82becc __CFRunLoopDoSource0 + 157
24  CoreFoundation                	    0x7ff81c82bca5 __CFRunLoopDoSources0 + 217
25  CoreFoundation                	    0x7ff81c82a92f __CFRunLoopRun + 916
26  CoreFoundation                	    0x7ff81c829f31 CFRunLoopRunSpecific + 560
27  HIToolbox                     	    0x7ff8262a5dad RunCurrentEventLoopInMode + 292
28  HIToolbox                     	    0x7ff8262a5bbe ReceiveNextEventCommon + 657
29  HIToolbox                     	    0x7ff8262a5918 _BlockUntilNextEventMatchingListInModeWithFilter + 64
30  AppKit                        	    0x7ff81f8be5d0 _DPSNextEvent + 858
31  AppKit                        	    0x7ff81f8bd47a -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1214
32  AppKit                        	    0x7ff81f8afae8 -[NSApplication run] + 586
33  libqcocoa.dylib               	       0x105d105b7 0x105cf9000 + 95671
34  QtCore                        	       0x107c6cf36 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 486
35  QtCore                        	       0x107c63d27 QCoreApplication::exec() + 119
36  StormText                     	       0x104d2299f main + 63
37  dyld                          	    0x7ff81c3f641f start + 1903

                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Accelerate framework               128K        1 
Activity Tracing                   256K        1 
CG backing stores                  528K        4 
CG image                            60K        3 
ColorSync                          260K       29 
CoreAnimation                       52K        9 
CoreGraphics                        12K        2 
CoreImage                            4K        1 
CoreServices                         4K        1 
CoreUI image data                  828K       11 
Foundation                          16K        1 
Kernel Alloc Once                    8K        1 
MALLOC                           184.8M       56 
MALLOC guard page                   32K        8 
MALLOC_NANO (reserved)           384.0M        1         reserved VM address space (unallocated)
STACK GUARD                       56.0M       11 
Stack                             13.1M       12 
VM_ALLOCATE                       79.8M       14 
VM_ALLOCATE (reserved)             5.5G        7         reserved VM address space (unallocated)
__CTF                               824        1 
__DATA                            19.1M      378 
__DATA_CONST                      15.6M      230 
__DATA_DIRTY                       653K      108 
__FONT_DATA                        2352        1 
__LINKEDIT                       177.9M       29 
__OBJC_RO                         66.3M        1 
__OBJC_RW                         2013K        2 
__TEXT                           292.7M      396 
dyld private memory                260K        2 
mapped file                      191.9M       41 
shared memory                      780K       17 
===========                     =======  ======= 
TOTAL                              6.9G     1379 
TOTAL, minus reserved VM space     1.1G     1379 



-----------
Full Report
-----------

{"app_name":"StormText","timestamp":"2023-06-28 19:34:17.00 +0800","app_version":"","slice_uuid":"473fc644-f133-35f0-b0f3-7c7246ad4fde","build_version":"","platform":1,"bundleID":"org.BrightSoftwareFoundation.StormText","share_with_app_devs":1,"is_first_party":0,"bug_type":"309","os_version":"macOS 13.4 (22F66)","roots_installed":0,"name":"StormText","incident_id":"BA706EBC-2E9A-4BB7-83A2-683E7B1394A7"}
{
  "uptime" : 220000,
  "procRole" : "Foreground",
  "version" : 2,
  "userID" : 501,
  "deployVersion" : 210,
  "modelCode" : "MacBookAir6,1",
  "coalitionID" : 3167,
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  "incident" : "BA706EBC-2E9A-4BB7-83A2-683E7B1394A7",
  "pid" : 96334,
  "cpuType" : "X86-64",
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  "bug_type" : "309",
  "procLaunch" : "2023-06-28 19:34:06.0880 +0800",
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  "codeSigningID" : "",
  "codeSigningTeamID" : "",
  "codeSigningValidationCategory" : 0,
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
...
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Model: MacBookAir6,1, BootROM 478.0.0.0.0, 2 processors, Dual-Core Intel Core i5, 1.3 GHz, 4 GB, SMC 2.12f143
Graphics: Intel HD Graphics 5000, Intel HD Graphics 5000, Built-In
Display: Color LCD, 1366 x 768 (WSGA - Wide eXtended Graphics Array), Main, MirrorOff, Online
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1600 MHz, 0x80AD, 0x483943434E4E4E384A544D4C41522D4E544D
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1600 MHz, 0x80AD, 0x483943434E4E4E384A544D4C41522D4E544D
AirPort: spairport_wireless_card_type_wifi (0x14E4, 0x117), Broadcom BCM43xx 1.0 (7.77.111.1 AirPortDriverBrcmNIC-1771)
AirPort: 
Bluetooth: Version (null), 0 services, 0 devices, 0 incoming serial ports
Network Service: Wi-Fi, AirPort, en0
Serial ATA Device: APPLE SSD TS0128F, 121.33 GB
USB Device: USB30Bus
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
Thunderbolt Bus: MacBook Air, Apple Inc., 23.6

As you can see, I am running my macOS Ventura 13.4 on Qt 6.5.1 and QScintilla 2.14.0. When the Scintilla component reaches its isModified thread, the application has crashed. This was all happened after I had closed the app's window.

What is the solution for this problem? Any help and comments would be greatly appreciate and thanks!

Thank you!

jsulm · wrote on 28 Jun 2023, 12:16

@JackMyson said in Developing QScintilla based application then crashes:

BrStormTextMainWindow::handleTabChanged(int)

I guess this is something you implemented? What are you doing there?
According to the stack trace a tab is removed (QTabBar::removeTab(int)) and then BrStormTextMainWindow::handleTabChanged(int) is called - I guess you are trying to access something already deleted.