Attached node background images not loading #226
Description
I created a *.alz file using version 3.0.0, then tried to open it later. Images do not display. and when I click on an object that should have an image in it the app crashes giving the messages below.
I tried opening in 3.6.1 and got same results.
$ ./Heimer-3.6.1-x86_64.AppImage
Mon Oct 31 00:09:48 2022 [I] Heimer version 3.6.1
Mon Oct 31 00:09:48 2022 [I] Copyright (c) 2018-2022 Jussi Lind
Mon Oct 31 00:09:48 2022 [I] Compiled against Qt version 5.9.5
Mon Oct 31 00:09:48 2022 [I] Trying Qt translations for 'en-US'
Mon Oct 31 00:09:48 2022 [W] Failed to load Qt translations for 'en-US'
Mon Oct 31 00:09:48 2022 [I] Trying application translations for 'en-US'
Mon Oct 31 00:09:48 2022 [W] Failed to load application translations for 'en-US'
Mon Oct 31 00:09:49 2022 [I] 'Single arrow' set as active default
Mon Oct 31 00:09:55 2022 [I] Extracting embedded image id=3 to '/tmp/Heimer-iITG7f/w.jpeg'
Mon Oct 31 00:09:55 2022 [I] Bytes written: 2813, OK
Mon Oct 31 00:09:55 2022 [I] Extracting embedded image id=4 to '/tmp/Heimer-3oPuxi/h.jpeg'
Mon Oct 31 00:09:55 2022 [I] Bytes written: 13476, OK
Mon Oct 31 00:09:55 2022 [I] Extracting embedded image id=1 to '/tmp/Heimer-1IqGFf/m.jpeg'
Mon Oct 31 00:09:55 2022 [I] Bytes written: 5600, OK
Mon Oct 31 00:09:55 2022 [I] Extracting embedded image id=2 to '/tmp/Heimer-nntEDi/h.jpeg'
Mon Oct 31 00:09:55 2022 [I] Bytes written: 13476, OK
Mon Oct 31 00:09:55 2022 [I] Extracting embedded image id=5 to '/tmp/Heimer-GEHgig/h.jpeg'
Mon Oct 31 00:09:55 2022 [I] Bytes written: 13476, OK
Mon Oct 31 00:09:55 2022 [I] Extracting embedded image id=6 to '/tmp/Heimer-IERp5h/m.jpeg'
Mon Oct 31 00:09:55 2022 [I] Bytes written: 5600, OK
Qt has caught an exception thrown from an event handler. Throwing
exceptions from an event handler is not supported in Qt.
You must not let any exception whatsoever propagate through Qt code.
If that is not possible, in Qt 5 you must at least reimplement
QCoreApplication::notify() and catch all exceptions there.
terminate called after throwing an instance of 'std::runtime_error'
what(): Cannot open file: '/tmp/Heimer-RkfgWi/m.jpeg'
Aborted (core dumped)