Created attachment 172433 [details]
The archive containing image.png and document.kra

SUMMARY
The command line option "--file-layer" crashes Krita.  Krita crashes once this option is set to an existing file or directory.  Tested on macOS and Arch Linux with KDE Plasma.

STEPS TO REPRODUCE
1. Run "krita --file-layer IMAGE KRITA_DOCUMENT.kra".  This crashes even if IMAGE is an empty file or a directory.

OBSERVED RESULT
Krita crashes.

EXPECTED RESULT
Krita properly starts and insert the image as a file layer.

SOFTWARE/OS VERSIONS
Windows: Haven't tested.
macOS: Sonoma 14.5
Linux:
    Distro: Arch Linux
    KDE Plasma Version: 6.1.3
    KDE Frameworks Version: 6.4.0
    Qt Version: 6.7.2

ADDITIONAL INFORMATION
Downgrading to version 5.2.2 seems to solve this issue on macOS.

The following backtraces are produced on Arch Linux.  Running "gdb --args krita --file-layer /tmp/test-krita/image.png /tmp/test-krita/document.kra" gives the backtrace:
```
#0  0x00007ffff7171980 in KisNode::parent This crashes even if IMAGE is an empty file or a directory,
    at /usr/src/debug/krita/krita-5.2.3/libs/image/kis_node.cpp:316
#1  0x00007ffff7aa04d0 in KisApplication::start (this=this@entry=0x7fffffffc940, args=...)
    at /usr/src/debug/krita/krita-5.2.3/libs/global/kis_shared_ptr.h:170
#2  0x000055555555bfeb in main (argc=<optimized out>, argv=<optimized out>)
    at /usr/src/debug/krita/krita-5.2.3/krita/main.cc:787
```
Running `gdb --args krita --file-layer /tmp/test-krita/empty_file /tmp/test-krita/document.kra`, where "empty_file" is an empty file, gives the backtrace:
```
#0  0x00007ffff7171980 in KisNode::parent (this=0x0)
    at /usr/src/debug/krita/krita-5.2.3/libs/image/kis_node.cpp:316
#1  0x00007ffff7aa04d0 in KisApplication::start (this=this@entry=0x7fffffffc940, args=...)
    at /usr/src/debug/krita/krita-5.2.3/libs/global/kis_shared_ptr.h:170
#2  0x000055555555bfeb in main (argc=<optimized out>, argv=<optimized out>)
    at /usr/src/debug/krita/krita-5.2.3/krita/main.cc:787
```
Running `gdb --args krita --file-layer /tmp/test-krita/ /tmp/test-krita/document.kra`, where "test-krita" is a directory, gives the backtrace:
```
#0  0x00007ffff7171980 in KisNode::parent (this=0x0)
    at /usr/src/debug/krita/krita-5.2.3/libs/image/kis_node.cpp:316
#1  0x00007ffff7aa04d0 in KisApplication::start (this=this@entry=0x7fffffffc950, args=...)
    at /usr/src/debug/krita/krita-5.2.3/libs/global/kis_shared_ptr.h:170
#2  0x000055555555bfeb in main (argc=<optimized out>, argv=<optimized out>)
    at /usr/src/debug/krita/krita-5.2.3/krita/main.cc:787
```
The relevant files "image.png" and "document.kra" are attached as a zip archive.