set_by_lua_block invalid syntax

[mikz]

I'd like to report that using set_by_lua_block syntax is unrecognized.

server {
  set_by_lua_block $res { return 32 + math.cos(32) }
}

is example straight from ngx-lua documentation.

nginx plugin 0.1.3
lua plugin 1.0.91-145-162

[mikz]

@Deadleg this still does not work when it appears in a file that is later included. So for example:

server {
  include file.conf
}

set_by_lua_block $res { return 32 + math.cos(32) }

I understand it the context can't be known, but location and other keywords work just fine.