~/Downloads $ waifu2x-converter-cpp -i test.jpg -o out.jpg
[1]    1826 segmentation fault (core dumped)  waifu2x-converter-cpp -i test.jpg -o out.jpg
~/Downloads $ gdb --args waifu2x-converter-cpp -i test.jpg -o out.jpg
GNU gdb (GDB) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from waifu2x-converter-cpp...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/waifu2x-converter-cpp -i test.jpg -o out.jpg
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffef880700 (LWP 2068)]

Thread 1 "waifu2x-convert" received signal SIGSEGV, Segmentation fault.
0x00007ffff4303ad0 in pthread_mutex_lock () from /usr/lib/libpthread.so.0
(gdb)