MacOS - Mixxx Crashes when opening Rekordbox USB

[mixxxbot]

Reported by: snowyoneill Date: 2021-11-23T22:28:21Z Status: New Importance: Undecided Launchpad Issue: lp1952005 Attachments: [Rekordbox PDB which crashes under MacOS](https://bugs.launchpad.net/bugs/1952005/+attachment/5542882/+files/Rekordbox PDB which crashes under MacOS)

---

Mixxx 2.3.1 MacOS Big Sur

Steps to reproduce the problem:

• In library, click on Rekordbox. An arrow appears to expand
• Click arrow, the USB drive shows
• Click USB drive, Mixxx either hangs or crashes

Expected behaviour:

• Show the contents of the Recordbox library

Information logs

• Rekordbox export db

I've tested this on 3 different Mac Books ( Pro x2 + Air, I've also tried 2 different USBs with different libraries ) - if i test under --developer mode it throws a seg fault. These USBs load fine under Linux and Windows versions ( tested using 2.3.1 across all platforms ).

If i run Mixxx in --developer mode i get these logs

Mixxx Crashes
```
Debug [Main]: RekordboxFeature::activate()
Debug [Main]: RekordboxFeature::activateChild  "ELSCANO"  playlist:  "/Volumes/ELSCANO"  doParseDeviceDB:  true
Debug [Main]: Parse Rekordbox Device DB:  "/Volumes/ELSCANO"
mixxx(91893,0x7000042b7000) malloc: *** error for object 0x7fd7082ab240: pointer being freed was not allocated
mixxx(91893,0x7000042b7000) malloc: *** set a breakpoint in malloc_error_break to debug
zsh: abort      /Applications/mixxx.app/Contents/MacOS/mixxx --developer
```

Mixxx Hangs
```
Debug [Main]: RekordboxFeature::activate()
Debug [Main]: RekordboxFeature::activateChild  "ELSCANO"  playlist:  "/Volumes/ELSCANO"  doParseDeviceDB:  true
Debug [Main]: Parse Rekordbox Device DB:  "/Volumes/ELSCANO"
Debug [Thread (pooled)]: parseDeviceDB device:  "ELSCANO"  devicePath:  "/Volumes/ELSCANO"
Debug [Thread (pooled)]: DbConnection - Opening database connection "MIXXX-11" QSqlDatabase(driver="QSQLITE", database="file:///Users/<user>/Library/Containers/org.mixxx.mixxx/Data/Library/Application Support/Mixxx/mixxxdb.sqlite", host="", port=-1, user="mixxx", open=false)
Info [Thread (pooled)]: DbConnectionPool - Cloned thread-local database connection "MIXXX-11" QSqlDatabase(driver="QSQLITE", database="file:///Users/<user>/Library/Containers/org.mixxx.mixxx/Data/Library/Application Support/Mixxx/mixxxdb.sqlite", host="", port=-1, user="mixxx", open=true)
Debug [Thread (pooled)]: DbConnectionPooled - Found thread-local database connection "MIXXX-11" QSqlDatabase(driver="QSQLITE", database="file:///Users/<user>/Library/Containers/org.mixxx.mixxx/Data/Library/Application Support/Mixxx/mixxxdb.sqlite", host="", port=-1, user="mixxx", open=true)
2021-11-23 13:34:27.649 mixxx[92132:7866935] WARNING: NSWindow drag regions should only be invalidated on the Main Thread! This will throw an exception in the future. Called from (
    0   AppKit                              0x00007fff22e8a47f -[NSWindow(NSWindow_Theme) _postWindowNeedsToResetDragMarginsUnlessPostingDisabled] + 352
    1   AppKit                              0x00007fff22e75121 -[NSWindow _initContent:styleMask:backing:defer:contentView:] + 1375
    2   AppKit                              0x00007fff23037377 -[NSPanel _initContent:styleMask:backing:defer:contentView:] + 50
    3   AppKit                              0x00007fff22e74bbb -[NSWindow initWithContentRect:styleMask:backing:defer:] + 42
    4   AppKit                              0x00007fff2303732c -[NSPanel initWithContentRect:styleMask:backing:defer:] + 64
    5   AppKit                              0x00007fff2317f1f4 -[NSWindow initWithContentRect:styleMask:backing:defer:screen:] + 52
    6   libqcocoa.dylib                     0x0000000111a96a0b -[QNSPanel initWithContentRect:styleMask:backing:defer:screen:platformWindow:] + 219
    7   libqcocoa.dylib                     0x0000000111a83b6c _ZN12QCocoaWindow14createNSWindowEb + 1116
    8   libqcocoa.dylib                     0x0000000111a7d670 _ZN12QCocoaWindow22recreateWindowIfNeededEv + 1264
    9   libqcocoa.dylib                     0x0000000111a7d0fb _ZN12QCocoaWindow10initializeEv + 315
    10  QtGui                               0x000000010e60db0c _ZN14QWindowPrivate6createEby + 140
    11  QtWidgets                           0x000000010de096c1 _ZN14QWidgetPrivate10create_sysEybb + 1217
    12  QtWidgets                           0x000000010de083a6 _ZN7QWidget6createEybb + 374
    13  QtWidgets                           0x000000010de1bac3 _ZN14QWidgetPrivate10setVisibleEb + 195
    14  QtWidgets                           0x000000010dfe567d _ZN7QDialog10setVisibleEb + 125
    15  QtWidgets                           0x000000010dfe4ec3 _ZN7QDialog4execEv + 243
    16  QtWidgets                           0x000000010e022b92 _ZL17showNewMessageBoxP7QWidgetN11QMessageBox4IconERK7QStringS5_6QFlagsINS1_14StandardButtonEES7_ + 354
    17  mixxx                               0x000000010cae7fdf _ZN7Sandbox12askForAccessERK7QString + 367
)
Warning [Thread (pooled)]: QPainter::begin: A paint device can only be painted by one painter at a time.
Warning [Thread (pooled)]: QPainter::setCompositionMode: Painter not active
Warning [Thread (pooled)]: QBackingStore::endPaint() called with active painter on backingstore paint device
```

I will try to get a back trace to aid in debugging but i don't have access to a Mac for testing right now.

[mixxxbot]

Commented by: snowyoneill Date: 2021-11-23T22:28:21Z Attachments: Rekordbox PDB which crashes under MacOS

[MrDogeBro]

I am also having this issue. Any updates on what is causing this or any potential fixes?

[daschuer]

Which version for Mixxx did you use on which OS?

[ryardley]

For me it worked for a time then I added a playlist in rekordbox and then the crash started happening.

[ronso0]

If you can reproduce it please create a backtrace https://github.com/mixxxdj/mixxx/wiki/Creating-Backtraces#linux--mac-os-x-with-xcode-4x