Run of fresh-snapshots for python-btrees

Try this locally (using silver-platter):

debian-svp new-upstream --snapshot python-btrees 
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x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fwrapv -O2 -Wl,-z,relro -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.9/BTrees/_OQBTree.o -o /<<PKGBUILDDIR>>/.pybuild/cpython3_3.9_btrees/build/BTrees/_OQBTree.cpython-39-x86_64-linux-gnu.so
building 'BTrees._fsBTree' extension
x86_64-linux-gnu-gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O2 -Wall -g -ffile-prefix-map=/build/python3.9-RNBry6/python3.9-3.9.2=. -fstack-protector-strong -Wformat -Werror=format-security -g -fwrapv -O2 -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DEXCLUDE_INTSET_SUPPORT -I/usr/lib/python3/dist-packages -I/usr/include/python3.9 -c BTrees/_fsBTree.c -o build/temp.linux-x86_64-3.9/BTrees/_fsBTree.o
x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fwrapv -O2 -Wl,-z,relro -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.9/BTrees/_fsBTree.o -o /<<PKGBUILDDIR>>/.pybuild/cpython3_3.9_btrees/build/BTrees/_fsBTree.cpython-39-x86_64-linux-gnu.so
PYTHONPATH=. http_proxy=http://127.0.0.1:9/ python3 -m sphinx -qNE -b html docs build/html

Theme error:
sphinx_rtd_theme is no longer a hard dependency since version 1.4.0. Please install it manually.(pip install sphinx_rtd_theme)
make[1]: *** [debian/rules:16: override_dh_auto_build] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:12: build] Error 2
dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2
--------------------------------------------------------------------------------
Build finished at 2021-03-28T03:40:25Z

Summary

Merged new upstream version: 4.7.2+git20201111.21e428c (was: 4.3.1).

Full worker log Full build log Full dist log