Crashing when slicing with wipetower #743

New Issue

MrUnknownDE · 2026-04-05T16:28:14+02:00

MrUnknownDE commented

2026-04-05 16:28:14 +02:00

Originally created by @TheDevMinerTV on 2/15/2026

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

0604aa5c76

Operating System (OS)

Linux

OS Version

CachyOS 6.19.0-1-cachyos-bore

Additional system information

CPU: AMD Ryzen 7950X
RAM: 64GB
GPU: Nvidia RTX 4080

Printer

Snapmaker U1

How to reproduce

Set up a plate that requires a wipe tower
Slice

Actual results

It crashes with the following message in the terminal

/usr/include/c++/15.2.1/optional:1165: constexpr const _Tp* std::optional<_Tp>::operator->() const [with _Tp = Slic3r::WipeTowerData::WipeTowerMeshData]: Assertion 'this->_M_is_engaged()' failed.

Expected results

It should not crash

Project file & Debug log uploads

wipetower-crash.zip

debug_Sun_Feb_15_17_42_54_114603.log.0.zip

Checklist of files to include

Log file
Project file

Anything else?

built from source with the AUR package.

*Originally created by @TheDevMinerTV on 2/15/2026* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 0604aa5c76 ### Operating System (OS) Linux ### OS Version CachyOS 6.19.0-1-cachyos-bore ### Additional system information CPU: AMD Ryzen 7950X RAM: 64GB GPU: Nvidia RTX 4080 ### Printer Snapmaker U1 ### How to reproduce 1. Set up a plate that requires a wipe tower 2. Slice ### Actual results It crashes with the following message in the terminal ``` /usr/include/c++/15.2.1/optional:1165: constexpr const _Tp* std::optional<_Tp>::operator->() const [with _Tp = Slic3r::WipeTowerData::WipeTowerMeshData]: Assertion 'this->_M_is_engaged()' failed. ``` ### Expected results It should not crash ### Project file & Debug log uploads [wipetower-crash.zip](https://github.com/user-attachments/files/25326757/wipetower-crash.zip) [debug_Sun_Feb_15_17_42_54_114603.log.0.zip](https://github.com/user-attachments/files/25326767/debug_Sun_Feb_15_17_42_54_114603.log.0.zip) ### Checklist of files to include - [x] Log file - [x] Project file ### Anything else? built from source with the [AUR package](https://aur.archlinux.org/packages/orca-slicer-git).

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No Label 2.3.2-beta2 2.3.2-beta2 2.3.2-beta2 2.3.2-beta2 2.3.2-beta2 bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug

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Reference: github/OrcaSlicer#743