how to find unused local variables?

[nr@... (Norman Ramsey)]

I have just finished a major refactoring of about 1000 lines of Lua
code which I have now split into 4 or 5 different modules.
In the process, I suspect I have defined some local variables that are not
used.  I seem to remember that once upon a time LHF posted a script
that could be run over the output of luac to find unused local variables,
but I am not having any luck finding something in the archives.

Does anyone have suggestions for how to identify unused local variables?
(Remember that to be unused, a local variable must not be used as an
upvalue, either.)


Norman