bug: Cantata crashes when saving track metadata changes

[marcecj]

System Details OS: OpenSuse Tumbleweed (release 20241213) Arch: x86_64 Desktop Environment: Plasma Version: 3.3.0 Installed by: native package manager (zypper)

Describe the bug I was editing the metadata of multiple FLAC files, and every one of the three times I hit "Save", Cantata crashes. Two of those times I got the following stack trace:

 Unfortunately Cantata has crashed. Please report a bug at
 https://github.com/nullobsi/cantata/issues/ and include the following stack trace:
   /lib64/libc.so.6 : ()+0x41580
   /usr/bin/cantata : ()+0x1feee9
   /usr/bin/cantata : ()+0x202b58
   /usr/bin/cantata : ()+0x38c091
   /usr/bin/cantata : ()+0x38cb15
   /lib64/libQt6Core.so.6 : ()+0x20dd81
   /lib64/libQt6Widgets.so.6 : QDialogButtonBox::clicked(QAbstractButton*)+0x43
   /lib64/libQt6Widgets.so.6 : ()+0x3c7fb5
   /lib64/libQt6Core.so.6 : ()+0x20db21
   /lib64/libQt6Widgets.so.6 : QAbstractButton::clicked(bool)+0x46
   /lib64/libQt6Widgets.so.6 : ()+0x2f568e
   /lib64/libQt6Widgets.so.6 : ()+0x2f57cd
   /lib64/libQt6Widgets.so.6 : QAbstractButton::mouseReleaseEvent(QMouseEvent*)+0xd9
   /lib64/libQt6Widgets.so.6 : QWidget::event(QEvent*)+0xb93
   /lib64/libQt6Widgets.so.6 : QApplicationPrivate::notify_helper(QObject*, QEvent*)+0x85

It looks like two out of eight files had their metadata updated, but the rest are untouched.

To Reproduce Steps to reproduce the behavior:

1. Highlight multiple tracks in the playlist.
2. Right-click on the tracks and select "edit track information" ("Informationen über das Stück bearbeiten")
3. Edit some metadata
4. Click "Save"

Expected behavior The track metadata saves correctly