Run of fresh-snapshots for xaos

Try this locally (using silver-platter):

debian-svp new-upstream --snapshot xaos 
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Using pristine-tar to reconstruct xaos/4.2.1+git20210422.1.0d32671.
pristine-tar: successfully generated /tmp/janitor08uegduw/xaos_4.2.1+git20210422.1.0d32671.orig.tar.gz
Building the package in /tmp/janitor08uegduw/build-area/xaos-4.2.1+git20210422.1.0d32671, using sbuild -A -s -v
dpkg-source: info: using source format '3.0 (quilt)'
dpkg-source: info: building xaos using existing ./xaos_4.2.1+git20210422.1.0d32671.orig.tar.gz
dpkg-source: info: using patch list from debian/patches/series
dpkg-source: error: LC_ALL=C patch -t -F 0 -N -p1 -u -V never -E -b -B .pc/debian-bug-665636.patch/ --reject-file=- < xaos-4.2.1+git20210422.1.0d32671.orig.XULOrJ/debian/patches/debian-bug-665636.patch subprocess returned exit status 1
can't find file to patch at input line 19
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|From ee862728fd1ecb58a5d93d8f830d3cc0a33f5f4f Mon Sep 17 00:00:00 2001
|From: =?UTF-8?q?Zolt=C3=A1n=20Kov=C3=A1cs?= <zoltan@geogebra.org>
|Date: Tue, 16 Feb 2021 07:31:59 +0100
|Subject: [PATCH] Fix https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=665636

Summary

Merged new upstream version: 4.2.1+git20210422.1.0d32671 (was: 4.2.1).

Full worker log Full build log Full dist log