Crash when slicing special SL1 project

[tritol]

Version

Version: 2.2.0
Build: PrusaSlicer-2.2.0+UNKNOWN

Operating system type + version

Operating System: Unix
System Architecture: 64 bit
System Version: Linux 5.8.8-arch1-1 x86_64
Total RAM size [MB]: 33,488MB

3D printer brand / version + firmware version (if known)

Original Prusa SL1

Behavior

Crash when slicing only one layer object.
Load slicer-killer.3mf and press "Slice now"

Project File (.3MF) where problem occurs

slicer-killer.zip

[lukasmatena]

Confirmed. The cause of the crash is in void SLAPrint::Steps::apply_printer_corrections. When there is just one slice, faded_lyrs = std::min(po.m_slice_index.size(), faded_lyrs); will assign 1 into faded_lyrs. And this immediately leads to division by zero just below that. This creates a NAN value, which in turns makes it crash a little down the road.

Maybe @tamasmeszaros would know what to do.