Segmentation fault (core dumped)

[xqgex]

I am getting a seg fault error when running PrusaControl,
File name: prusacontrol_0.9.4.415_beta.AppImage
Downloaded from: https://prusacontrol.org/#download
System version: Fedora (4.17.6-200.fc28.x86_64)

[probonopd]

Please run LD_DEBUG=libs ./prusacontrol_0.9.4.415_beta.AppImage, do you see any errors?

[xqgex]

The output is 5591 lines long,
Doing search for the words "error" and 'fatal" gave me:

15 times (Lines 2711 until 2725):
32326: /lib64/libGL.so.1: error: symbol lookup error: undefined symbol: FunctionType (fatal)
90 times (Lines 2765 until 2854):
32326: /lib64/libGLU.so.1: error: symbol lookup error: undefined symbol: FunctionType (fatal)
lines 3620 to 3638:

     32326:	find library=libgpg-error.so.0 [0]; searching
     32326:	 search path=/tmp/.mount_prusac5QfCZ6/usr/lib:/tmp/.mount_prusac5QfCZ6/usr/lib/x86_64-linux-gnu:/tmp/.mount_prusac5QfCZ6/lib:/tmp/.mount_prusac5QfCZ6/lib/x86_64-linux-gnu:tls/x86_64/x86_64:tls/x86_64:tls/x86_64:tls:x86_64/x86_64:x86_64:x86_64:		(LD_LIBRARY_PATH)
     32326:	  trying file=/tmp/.mount_prusac5QfCZ6/usr/lib/libgpg-error.so.0
     32326:	  trying file=/tmp/.mount_prusac5QfCZ6/usr/lib/x86_64-linux-gnu/libgpg-error.so.0
     32326:	  trying file=/tmp/.mount_prusac5QfCZ6/lib/libgpg-error.so.0
     32326:	  trying file=/tmp/.mount_prusac5QfCZ6/lib/x86_64-linux-gnu/libgpg-error.so.0
     32326:	  trying file=tls/x86_64/x86_64/libgpg-error.so.0
     32326:	  trying file=tls/x86_64/libgpg-error.so.0
     32326:	  trying file=tls/x86_64/libgpg-error.so.0
     32326:	  trying file=tls/libgpg-error.so.0
     32326:	  trying file=x86_64/x86_64/libgpg-error.so.0
     32326:	  trying file=x86_64/libgpg-error.so.0
     32326:	  trying file=x86_64/libgpg-error.so.0
     32326:	  trying file=libgpg-error.so.0
     32326:	 search cache=/etc/ld.so.cache
     32326:	  trying file=/lib64/libgpg-error.so.0
     32326:	
     32326:	
     32326:	calling init: /lib64/libgpg-error.so.0

Lines 4008, 4479 and 5308:
32326: /lib64/libharfbuzz.so.0: error: symbol lookup error: undefined symbol: FT_Get_Var_Blend_Coordinates (fatal)

[probonopd]

Yes, HarfBuzz strikes again! It seems to be so closely linked to FreeType that either both or none must be bundled but not just one of them without the other.

Please try whether this fixes it:

./prusacontrol_0.9.4.415_beta.AppImage --appimage-extract
find squashfs-root/ -name *freetype* -delete
./squashfs-root/AppRun 
# Does it run?

If this solves it (without breaking it for other distributions), then we should consider to not bundle FreeType in the AppImage.

References:

• No longer bundle libharfbuzz and libfreetype AppImageCommunity/pkg2appimage#323
• linuxdeployqt blacklists libfontconfig probonopd/linuxdeployqt#261 (comment)
• Created in Debian Jessie, Got undefined symbol error in Fedora probonopd/linuxdeployqt#157 (comment)

[xqgex]

Running that command created a new folder called "squashfs-root", I've try to do

cd squashfs-root/
./AppRun

But still got "Segmentation fault (core dumped)"

[xqgex]

Based on:
https://gist.github.com/cryzed/e002e7057435f02cc7894b9e748c5671
It's seems like a problem with the freetype version

[probonopd]

Yes, did you run find squashfs-root/ -name *freetype* -delete (without doing cd squashfs-root/ first)? It should have deleted the bundled FreeType.

Run LD_DEBUG=libs ./squashfs-root/AppRun to see what is going on with FreeType and HarfBuzz this time...

[xqgex]

My bad, I thought that "find" is an arguments for the AppImage
Doing:

1. ./prusacontrol_0.9.4.415_beta.AppImage --appimage-extract
2. find squashfs-root/ -name freetype -delete
3. ./squashfs-root/AppRun

Works!!!

[probonopd]

So, FreeType should not be bundled @tibor-vavra