Core dumped when testing

[nkh]

Version: 3.7.0
WebKit compile: 2.38.6
WebKit run: 2.38.6
GTK compile: 3.24.33
GTK run: 3.24.33
libsoup compile: 3.0.7
libsoup run: 3.0.7
Extension dir: /usr/local/lib/vimb

Steps to reproduce

clone, build, no config change

Expected behaviour

open browser

Actual behaviour

browser flashes the core dumps.

web_ext freshly installed with npm.

16 ~/.../vimb master 3u make runsandbox
make[1]: Entering directory '/home/nadim/nadim/devel/repositories/vimb'
make[2]: Entering directory '/home/nadim/nadim/devel/repositories/vimb/src'
make[3]: Entering directory '/home/nadim/nadim/devel/repositories/vimb/src/webextension'
make[3]: Nothing to be done for 'all'.
make[3]: Leaving directory '/home/nadim/nadim/devel/repositories/vimb/src/webextension'
make[2]: Leaving directory '/home/nadim/nadim/devel/repositories/vimb/src'
install -d ./sandbox/usr/bin
install -m 755 src/vimb ./sandbox/usr/bin/vimb
install -d ./sandbox/usr/lib/vimb
install -m 644 src/webextension/webext_main.so ./sandbox/usr/lib/vimb/webext_main.so
install -d ./sandbox/usr/share/man/man1
install -d ./sandbox/usr/share/applications
install -m 644 vimb.desktop ./sandbox/usr/share/applications/vimb.desktop
install -d ./sandbox/usr/share/metainfo
install -m 644 vimb.metainfo.xml ./sandbox/usr/share/metainfo/vimb.metainfo.xml
make[1]: Leaving directory '/home/nadim/nadim/devel/repositories/vimb'
sandbox/usr/bin/vimb
** Message: 15:39:19.666: Could not read style file: /home/nadim/.config/vimb/style.css

** (vimb:547963): ERROR **: 15:39:19.702: Cannot access web extension /usr/local/lib/vimb/webext_main.so
make: *** [Makefile:51: runsandbox] Trace/breakpoint trap (core dumped)

[night0721]

Same issue here