</A></H2>
<P>
Here are the main changes introduced in Lua 5.4.
The
<A HREF="contents.html">reference manual</A>
lists the
<A HREF="manual.html#8">incompatibilities</A> that had to be introduced.

<H3>Main changes</H3>
<UL>
<LI> new generational mode for garbage collection
<LI> to-be-closed variables
<LI> const variables
<LI> userdata can have multiple user values
<LI> new implementation for math.random
<LI> warning system
<LI> debug information about function arguments and returns
<LI> new semantics for the