[1] 2129 illegal hardware instruction (core dumped) th ./waifu2x.lua about waifu2x

[Saren-Arterius]

th ./web.lua also shows the same core dump message as soon as an image is uploaded.

[Saren-Arterius]

coredumpctl gdb 5259
           PID: 5259 (luajit)
           UID: 1000 (saren)
           GID: 100 (users)
        Signal: 4 (ILL)
     Timestamp: 三 2015-11-18 13:10:46 HKT (1min 33s ago)
  Command Line: /home/saren/torch/install/bin/luajit -e package.path="/home/saren/.luarocks/share/lua/5.1/?.lua;/home/saren/.luarocks/share/lua/5.1/?/init.lua;/home/saren/torch/install/share/lua/5.1/?.lua;/home/saren/torch/install/share/lua/5.1/?/init.lua;"..package.path; package.cpath="/home/saren/.luarocks/lib/lua/5.1/?.so;/home/saren/torch/install/lib/lua/5.1/?.so;"..package.cpath -e local k,l,_=pcall(require,"luarocks.loader") _=k and l.add_context("trepl","scm-1") /home/saren/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th ./waifu2x.lua
    Executable: /home/saren/torch/install/bin/luajit
 Control Group: /user.slice/user-1000.slice/session-c1.scope
          Unit: session-c1.scope
         Slice: user-1000.slice
       Session: c1
     Owner UID: 1000 (saren)
       Boot ID: e6ea1988e12c45bf9780a45b2093541e
    Machine ID: acce3a42ddb543ee8a905e2102debcc2
      Hostname: Saren-PC-Arch
      Coredump: /var/lib/systemd/coredump/core.luajit.1000.e6ea1988e12c45bf9780a45b2093541e.5259.1447823446000000.lz4
       Message: Process 5259 (luajit) of user 1000 dumped core.

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Reading symbols from /home/saren/torch/install/bin/luajit...(no debugging symbols found)...done.
[New LWP 5259]
[New LWP 5284]
[New LWP 5271]
[New LWP 5270]

warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `/home/saren/torch/install/bin/luajit -e package.path="/home/saren/.luarocks/sha'.
Program terminated with signal SIGILL, Illegal instruction.
#0  0x00007f36443ae722 in ?? () from /usr/lib/libblas.so.3
[Current thread is 1 (Thread 0x7f3646665740 (LWP 5259))]
(gdb) 

[Saren-Arterius]

The core dump file
https://github.com/Saren-Arterius/FileStorage/raw/master/waifu2x.dump.xz

[Saren-Arterius]

I found that Torch test failed, probably not waifu2x's issue.

% LANG=en_US.UTF8 ./test.sh                                                                                                                                      :(
Using Lua at:
/home/saren/torch/install/bin/luajit
paths loaded succesfully
torch loaded succesfully
Torch 7.0  Copyright (C) 2001-2011 Idiap, NEC Labs, NYU
env loaded succesfully  
trepl loaded succesfully    
dok loaded succesfully
image loaded succesfully
cwrap loaded succesfully
gnuplot loaded succesfully
optim loaded succesfully
sys loaded succesfully
xluajit loaded succesfully
argcheck loaded succesfully
graph loaded succesfully
nn loaded succesfully
nngraph loaded succesfully
nnx loaded succesfully
threads loaded succesfully
Running 139 tests   
_|_________________________________________________________________________________________________________________________________________  ==> RNGState./test.sh: line 33:  2174 Illegal instruction     (core dumped) th -ltorch -e "torch.test()"

[Saren-Arterius]

Reinstalled torch and its dependencies, test passed, and th waifu2x.lua works now.