This is a follow on from:
http://mailman.nginx.org/pipermail/nginx/2011-October/029905.html

The conditional statements take care of the basic error but what
happens is that when "post" requests match any of the test regexes, an
error is thrown ...
"lua handler aborted: runtime error: attempt to yield across
metamethod/C-call boundary blah, blah, blah".

It appears this is due to a limitation in Lua 5.1 and this yeilding is
a major item for Lua 5.2. However, trying to build Nginx with the lua
module against Lua 5.2 fails...


/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_conf.c
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:
In function 'ngx_http_lua_new_thread':
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:189:
error: 'LUA_GLOBALSINDEX' undeclared (first use in this function)
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:189:
error: (Each undeclared identifier is reported only once
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:189:
error: for each function it appears in.)
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:
In function 'ngx_http_lua_del_thread':
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:228:
warning: implicit declaration of function 'lua_getfenv'
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:234:
warning: implicit declaration of function 'lua_setfenv'
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:
In function 'init_ngx_lua_globals':
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:507:
error: 'LUA_GLOBALSINDEX' undeclared (first use in this function)
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:
In function 'ngx_http_lua_discard_bufs':
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:544:
warning: unused parameter 'pool'
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:
In function 'ngx_http_lua_set_multi_value_table':
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_util.c:1167:
warning: implicit declaration of function 'lua_objlen'
make[1]: *** [objs/addon/src/ngx_http_lua_util.o] Error 1
make[1]: *** Waiting for unfinished jobs....
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_conf.c:
In function 'ngx_http_lua_merge_loc_conf':
/usr/src/redhat/BUILD/nginx-1.0.8/ngx-lua-module-0.31rc17-0/src/ngx_http_lua_conf.c:95:
warning: unused parameter 'cf'
make[1]: Leaving directory `/usr/src/redhat/BUILD/nginx-1.0.8'
make: *** [build] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.63523 (%build)



The upshot is that perhaps only LuaJIT 2.0 can be used for all
features in recent versions of ngx_lua.

Luckily, I took a backup of my server state so I'll be rolling back
and commenting out the "post" block.

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