[antlr-interest] Problem writing a Grammar

[lists at mainiero.de]

Hi,

I'm trying to write a ANTLR grammar for Lua (www.lua.org). They have the
syntax on the documentation pages, an I stated just copying this int
ANTLRWorks and changing the syntax accordingly.
It looked like a walk-trough but i got struggled as ANTLRWorks reported
this in its console

Aborting because the following rules are mutually left-recursive:
    [functioncall, prefixexp, var]

Perhaps anyone can have a look at it to give me hints or solutions how
to get this grammar correct. I'm willing to donate this grammar, to
make it available on the ANTLR side.

Thanks

Nicolai Mainiero
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