This is a portion of the BNF grammar for Lua described in the Lua manual section 8:
var ::= Name | prefixexp `[´ exp `]´ | prefixexp `.´ Name
exp ::= nil | false | true | Number | String | `...´ | function |
prefixexp | tableconstructor | exp binop exp | unop exp
prefixexp ::= var | functioncall | `(´ exp `)´
As you can see, it contains one recursive reference between var and prefixexp, which ends in an infinite loop. I think this is a case of left recursion, although indirect, because if you inline the definition of var, prefixexp ends like this:
prefixexp ::= Name | prefixexp `[´ exp `]´ | prefixexp `.´ Name | functioncall | `(´ exp `)´
I'm not sure if this grammar is supposed to be directly implementable (despite the lack of operator precedence) or if it will require some transformation first.