Rebooting the system makes the issue disappear.

There's an issue somewhere: I built & installed libgpg-error 1.22 beta exactly
the same way as I did with 1.21. I'm not surprised by your answer: you guys have
already dismissed another perfectly valid issue report.

If I understand correctly, we cannot compile latest libgcrypt because:

• the installed libgpg-error is a beta release
• it has been installed in /usr instead of /usr/local

That's unusual.
So I rebuilt libgcrypt with libgpg-error stable 1.21 installed in /usr, and it
passed.

It is true that I have built & installed libgpg-error from git master into
/usr:
./configure --enable-shared=yes \

			--enable-maintainer-mode \
			--prefix=/usr --sysconfdir=/etc --localstatedir=/var

But what do you mean by "properly install the library"?

Configured with:
./configure --enable-shared=yes \

			--enable-maintainer-mode \
			--prefix=/usr --sysconfdir=/etc --localstatedir=/var

awk --version
GNU Awk 4.1.1, API: 1.1 (GNU MPFR 3.1.3, GNU MP 6.0.0)
Copyright (C) 1989, 1991-2014 Free Software Foundation.

Running the filter from the CLI: nothing happens.
root@/home/actionmystique/Program-Files/Ubuntu/GnuPG/git-libgpg-error# awk
'/^\"POT-Creation-Date:/&&!s{s=1;next};!/^#: /{print}'

^C