Causes a seg fault if an init_worker_by_lua block is present

[bpinske]

If any init_worker_by_lua block is present at all in my config, my worker processes core dump immediately. Below is the gdb trace of my core dump, version of resty and an example of the code triggering the problem. I have not been able to reproduce this problem in any other *_by_lua block.

dockerd[1968]: 2017/11/12 23:08:10 [alert] 1#1: worker process 29 exited on signal 11 (core dumped)

init_worker_by_lua '
  local function hi(premature)
    ngx.log(ngx.ERR, "hi")
  end   ngx.timer.at(0, hi)
';

/usr/local/openresty/bin/openresty -V
nginx version: openresty/1.11.2.5
built by gcc 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.5)
built with OpenSSL 1.0.2k  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/usr/local/openresty/nginx --with-cc-opt=-O2 --add-module=../ngx_devel_kit-0.3.0 --add-module=../echo-nginx-module-0.61 --add-module=../xss-nginx-module-0.05 --add-module=../ngx_coolkit-0.2rc3 --add-module=../set-misc-nginx-module-0.31 --add-module=../form-input-nginx-module-0.12 --add-module=../encrypted-session-nginx-module-0.06 --add-module=../srcache-nginx-module-0.31--add-module=../ngx_lua-0.10.10 --add-module=../ngx_lua_upstream-0.07 --add-module=../headers-more-nginx-module-0.32 --add-module=../array-var-nginx-module-0.05 --add-module=../memc-nginx-module-0.18 --add-module=../redis2-nginx-module-0.14 --add-module=../redis-nginx-module-0.3.7 --add-module=../rds-json-nginx-module-0.14 --add-module=../rds-csv-nginx-module-0.07 --with-ld-opt=-Wl,-rpath,/usr/local/openresty/luajit/lib --with-openssl=/tmp/openssl-1.0.2k --with-pcre=/tmp/pcre-8.40 --add-module=/tmp/openresty-1.11.2.5/ngx_aws_auth --with-file-aio --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_flv_module --with-http_geoip_module=dynamic --with-http_gunzip_module --with-http_gzip_static_module --with-http_image_filter_module=dynamic --with-http_mp4_module --with-http_random_index_module --with-http_realip_module --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --with-http_v2_module --with-http_xslt_module=dynamic --with-ipv6 --with-mail --with-mail_ssl_module --with-md5-asm --with-pcre-jit --with-sha1-asm --with-stream --with-stream_ssl_module --with-threads

dockerd[1968]: 2017/11/12 23:08:10 [alert] 1#1: worker process 29 exited on signal 11 (core dumped)

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Reading symbols from /usr/local/openresty/bin/openresty...done.

warning: core file may not match specified executable file.
[New LWP 78]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `nginx: master process /usr/local/openresty/bin/openresty -c /ngin'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  ngx_http_add_variable (cf=cf@entry=0x7ffe5328a9a0,
    name=name@entry=0x9ec160 <ngx_http_aws_auth_vars>, flags=1)
    at src/http/ngx_http_variables.c:387
387 src/http/ngx_http_variables.c: No such file or directory.
(gdb)