Bug 511202

Summary: Krita crashes when G'MIC Layers Blend [Seamless] is used to blend two layers together
Product: [Applications] krita Reporter: Dustin <s9090db>
Component: G'Mic for KritaAssignee: Krita Bugs <krita-bugs-null>
Status: CONFIRMED ---    
Severity: crash CC: halla
Priority: NOR    
Version First Reported In: 5.2.13   
Target Milestone: ---   
Platform: Mint (Debian based)   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: GDB backtrace of crash - flatpak Krita 5.2.13
Krita System Information Log
Krita Usage Log

Description Dustin 2025-10-27 08:50:25 UTC
Created attachment 186220 [details]
GDB backtrace of crash - flatpak Krita 5.2.13

SUMMARY

Krita crashes when G'MIC Layers Blend [Seamless] is used to blend two layers together


STEPS TO REPRODUCE

1. Open any image
2. Create second layer
3. Start G'MIC
4. Select Layers > Blend [Seamless] (leave settings at default)
6. Click Apply button
7. Wait approximately 12 seconds

OBSERVED RESULT

Once Apply button is clicked, G'MIC will execute Blend [Seamless] operation of multiple layers, but immediately following, Krita hangs for approximately 12 seconds (with no response from keyboard or mouse input), then crashes. 

EXPECTED RESULT

After Apply button is pressed, G'MIC should execute the operation, and menu window should close when either the OK or Exit buttons are clicked, allowing user to continue working in Krita.


SOFTWARE/OS VERSIONS

Operating System: LMDE 7 Gigi

Cinnamon Version: 6.4.13

Linux Kernel: 6.12.48+deb13-amd64

Processor: Intel Core i7-7700 CPU @ 3.60GHz × 4

GPU: Intel HD Graphics 630


ADDITIONAL INFORMATION

Krita version(s) tested: 5.2.10 appimage, 5.2.13 flatpak, 5.2.14 prealpha appimage (crash occurs across all versions)

G’MIC version(s) tested in Krita: 3.5.0/3.5.3


The above procedure was also attempted in the flatpak version of GIMP 3.0.6 with G’MIC version 3.6.3. Crash did not occur, possibly indicating crash is specific to G’MIC versions 3.5.0 and 3.5.3. Crash only occurs when G’MIC versions 3.5.0 and 3.5.3 Layers Blend [Seamless] is used within Krita.

Note: Updating G'MIC filters from within G'MIC-Qt interface will allow Blend [Seamless] to function correctly for only a single instance. All subsequent uses induce the 12 second hang and crash.

Crash was replicated on multiple computers with varying hardware (including nVidia proprietary graphics) using LMDE 7 Gigi and Linux Mint 22.2 Zara.
Comment 1 Dustin 2025-10-27 08:51:35 UTC
Created attachment 186221 [details]
Krita System Information Log
Comment 2 Dustin 2025-10-27 08:52:06 UTC
Created attachment 186222 [details]
Krita Usage Log
Comment 3 Halla Rempt 2025-11-05 10:25:19 UTC
I also see this:

        gmic-qt: empty answer!
Segmentation fault

And can confirm the issue.