3.1.3 doesn't like uninitialised variables

[address@hidden]

This does what you'd expect with 3.1.2 and earlier, but 3.1.3 segfaults.
Looks like fun...
greetings

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#!/usr/bin/gawk -f

BEGIN {
 p(empty)
 p(empty)
}

function p (var) {
 print(var)
}