Probably caused by FEATURES="network-sandbox"? make: Entering directory '/var/tmp/portage/www-servers/tornado-4.5.3/work/tornado-4.5.3/docs' sphinx-build -b html -n -W -d build/doctrees . build/html Running Sphinx v1.6.5 making output directory... loading pickled environment... not yet created loading intersphinx inventory from https://docs.python.org/3.5/objects.inv... Warning, treated as error: intersphinx inventory 'https://docs.python.org/3.5/objects.inv' not fetchable due to <class 'requests.exceptions.ConnectionError'>: HTTPSConnectionPool(host='docs.python.org', port=443): Max retries exceeded with url: /3.5/objects.inv (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f82c23de630>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)) make: *** [Makefile:10: sphinx] Error 1 [ebuild U ] www-servers/tornado-4.5.3::gentoo [4.4.2-r1::gentoo] USE="doc -examples {-test}" PYTHON_TARGETS="python2_7 python3_5 -python3_4 -python3_6" Portage 2.3.40 (python 3.5.5-final-0, default/linux/amd64/17.0/no-multilib/hardened, gcc-7.3.0, glibc-2.26-r7, 4.18-rc4 x86_64) ================================================================= System uname: Linux-4.18-rc4-x86_64-Intel-R-_Core-TM-_i7-4920MQ_CPU_@_2.40GHz-with-gentoo-2.4.1 KiB Mem: 16298848 total, 6775268 free KiB Swap: 16777212 total, 16777212 free Timestamp of repository gentoo: Mon, 09 Jul 2018 00:45:01 +0000 sh bash 4.4_p12 ld GNU ld (Gentoo 2.30 p2) 2.30.0 distcc 3.2rc1 x86_64-pc-linux-gnu [disabled] ccache version 3.3.4 [disabled] app-shells/bash: 4.4_p12::gentoo dev-java/java-config: 2.2.0-r4::gentoo dev-lang/perl: 5.24.3-r1::gentoo dev-lang/python: 2.7.14-r1::gentoo, 3.4.8::gentoo, 3.5.5-r1::gentoo, 3.6.5::gentoo dev-util/ccache: 3.3.4-r1::gentoo dev-util/cmake: 3.11.4::gentoo dev-util/pkgconfig: 0.29.2::gentoo sys-apps/baselayout: 2.4.1-r2::gentoo sys-apps/openrc: 0.34.11::gentoo sys-apps/sandbox: 2.13::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69-r4::gentoo sys-devel/automake: 1.11.6-r3::gentoo, 1.13.4-r2::gentoo, 1.15.1-r2::gentoo sys-devel/binutils: 2.30-r2::gentoo sys-devel/gcc: 4.9.4::gentoo, 5.4.0-r4::gentoo, 6.4.0-r2::gentoo, 7.3.0-r3::gentoo, 8.1.0-r3::gentoo sys-devel/gcc-config: 1.8-r1::gentoo sys-devel/libtool: 2.4.6-r3::gentoo sys-devel/make: 4.2.1::gentoo sys-kernel/linux-headers: 4.17::gentoo (virtual/os-headers) sys-libs/glibc: 2.26-r7::gentoo ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="@FREE" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -mtune=native -ggdb" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -pipe -mtune=native -ggdb" ENV_UNSET="DBUS_SESSION_BUS_ADDRESS DISPLAY PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs collision-protect compressdebug config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch preserve-libs protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync webrsync-gpg xattr" FFLAGS="-O2 -pipe" LANG="POSIX" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LINGUAS="en et et_EE" MAKEOPTS="-j12" ABI_X86="64" CPU_FLAGS_X86="mmx mmxext sse sse2 aes avx avx2 f16c fma3 popcnt sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" KERNEL="linux" L10N="en et et-EE" PYTHON_SINGLE_TARGET="python3_5" PYTHON_TARGETS="python2_7 python3_5" USERLAND="GNU" Unset: CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
Created attachment 538896 [details] build.log
(In reply to Jaak Ristioja from comment #0) > Probably caused by FEATURES="network-sandbox"? Yup, (temporarily) disabling network-sandbox lets the build finish successfully > make: Entering directory > '/var/tmp/portage/www-servers/tornado-4.5.3/work/tornado-4.5.3/docs' Seeing the same issue with v5.1
Looks to be fixed in current versions in tree (6.2)