Mattias Engdegård <mattias.engdegard@gmail.com> writes:

> [...] Windows file names [...] tests [...] give us no indication.

Good catch!

I added more tests and updated the code to handle DOS/Windows paths.

>> How do false positives and performance tie to "beauty"?
>
> It's a figure of speech.

I see.

> [...] precisely what versions of Lua [...] information should go into
> the entry of compilation.txt (and the comments describing the new
> entries in compilation-error-regexp-alist-alist).

So that we can be 100% sure, today I compiled and tested the patch
against the last four versions of Lua, as well as, the famously speedy
fork LuaJIT.  It works correctly in all cases.  I added the version
information to the appropriate places.

I am attaching a new version of the patch.

Thank you!

Rudy