This bug is fixed in Ubuntu 20.10 (and probably earlier versions), as
Ubuntu 20.10 uses mawk 1.3.4 20200120. So you can close the bug report.
(I'd close the bug report myself but don't seem to have the bits to do
that.)
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Reproduced on Xenial. I had to install "make" and "lzip".
** Changed in: mawk (Ubuntu)
Status: New => Triaged
** Changed in: mawk (Ubuntu)
Importance: Undecided => Medium
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