Opening a folder containing a javascript file generates a seg fault. To trigger this, I put a file foo.js containing just // or /* in an empty folder and open that folder in nautilus. The same happens when I have the folder opened in nautilus first and then move/create the file into that folder, or editing an existing file.
The strings // or /* has to be at the beginning of the file and the file name must end with .js.
It looks like libgio entered an infinite recursion: the core dump says
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00007f881e040bad in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#1 0x00007f881e040fb8 in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#2 0x00007f881e0411f3 in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#3 0x00007f881e0411f3 in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
<omitted between>
#87223 0x00007f881e0411f3 in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#87224 0x00007f881e0411f3 in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#87225 0x00007f881dfcf1c5 in g_content_type_guess () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#87226 0x00007f881e0369cd in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#87227 0x00007f881e036e0b in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#87228 0x00007f881e033095 in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#87229 0x00007f881df6ad80 in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#87230 0x00007f881dfb1194 in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#87231 0x00007f881ec9f6b4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#87232 0x00007f881ec9ca51 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#87233 0x00007f881d894ac3 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442
#87234 0x00007f881d926850 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
Version of nautilus is GNOME nautilus 42.6.
Likely unrelated, nautilus outputs the following in the terminal at startup, even when opening directories not causing the crash
(org.gnome.Nautilus:45165): Tracker-WARNING **: 16:28:58.848: Could not delete '.meta.isrunning': No such file or directory
** (org.gnome.Nautilus:45165): WARNING **: 16:28:58.848: Unable to initialize tag manager: Database version is too new: got version 28, but 26 is needed