Read the Docs build information Build id: 3655752 Project: xanaduai-pennylane Version: latest Commit: ea14c18e9b9ea3c76f8cdc33e6ae83b165e93e48 Date: 2026-01-12T20:14:21.793721Z State: cancelled Success: False [rtd-command-info] start-time: 2026-01-12T20:14:22.762162Z, end-time: 2026-01-12T20:14:25.456860Z, duration: 2, exit-code: 0 git clone --depth 1 https://github.com/PennyLaneAI/pennylane.git . Cloning into '.'... [rtd-command-info] start-time: 2026-01-12T20:14:25.650179Z, end-time: 2026-01-12T20:14:27.076359Z, duration: 1, exit-code: 0 git fetch origin --force --prune --prune-tags --depth 50 refs/heads/master:refs/remotes/origin/master [rtd-command-info] start-time: 2026-01-12T20:14:27.934060Z, end-time: 2026-01-12T20:14:28.721639Z, duration: 0, exit-code: 0 git checkout --force origin/master Note: switching to 'origin/master'. You are in 'detached HEAD' state. You can look around, make experimental changes and commit them, and you can discard any commits you make in this state without impacting any branches by switching back to a branch. If you want to create a new branch to retain commits you create, you may do so (now or later) by using -c with the switch command. Example: git switch -c Or undo this operation with: git switch - Turn off this advice by setting config variable advice.detachedHead to false HEAD is now at ea14c18 Update perturbation error test in labs (#8790) [rtd-command-info] start-time: 2026-01-12T20:14:28.946476Z, end-time: 2026-01-12T20:14:28.989292Z, duration: 0, exit-code: 0 cat .readthedocs.yml # .readthedocs.yml # Read the Docs configuration file # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details # Required version: 2 build: os: ubuntu-24.04 tools: python: "3.11" apt_packages: - graphviz # Build documentation in the docs/ directory with Sphinx sphinx: configuration: doc/conf.py # Build documentation with MkDocs #mkdocs: # configuration: mkdocs.yml # Optionally build your docs in additional formats such as PDF and ePub formats: - htmlzip # Optionally set the version of Python and requirements required to build your docs python: install: - method: pip path: . extra_requirements: - 'docs' [rtd-command-info] start-time: 2026-01-12T20:14:34.204611Z, end-time: 2026-01-12T20:14:47.157758Z, duration: 12, exit-code: 0 apt-get update --assume-yes --quiet Hit:1 http://archive.ubuntu.com/ubuntu noble InRelease Get:2 http://security.ubuntu.com/ubuntu noble-security InRelease [126 kB] Get:3 http://archive.ubuntu.com/ubuntu noble-updates InRelease [126 kB] Get:4 http://archive.ubuntu.com/ubuntu noble-backports InRelease [126 kB] Get:5 http://archive.ubuntu.com/ubuntu noble/main amd64 Components [665 kB] Get:6 http://security.ubuntu.com/ubuntu noble-security/main amd64 Packages [1765 kB] Get:7 http://archive.ubuntu.com/ubuntu noble/universe amd64 Components [5943 kB] Get:8 http://security.ubuntu.com/ubuntu noble-security/main amd64 Components [24.8 kB] Get:9 http://security.ubuntu.com/ubuntu noble-security/universe amd64 Packages [1188 kB] Get:10 http://archive.ubuntu.com/ubuntu noble/multiverse amd64 Components [41.9 kB] Get:11 http://archive.ubuntu.com/ubuntu noble-updates/main amd64 Packages [2141 kB] Get:12 http://security.ubuntu.com/ubuntu noble-security/universe amd64 Components [91.3 kB] Get:13 http://security.ubuntu.com/ubuntu noble-security/restricted amd64 Packages [2908 kB] Get:14 http://archive.ubuntu.com/ubuntu noble-updates/main amd64 Components [235 kB] Get:15 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 Packages [1955 kB] Get:16 http://security.ubuntu.com/ubuntu noble-security/restricted amd64 Components [156 B] Get:17 http://security.ubuntu.com/ubuntu noble-security/multiverse amd64 Packages [33.1 kB] Get:18 http://security.ubuntu.com/ubuntu noble-security/multiverse amd64 Components [157 B] Get:19 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 Components [520 kB] Get:20 http://archive.ubuntu.com/ubuntu noble-updates/restricted amd64 Packages [3077 kB] Get:21 http://archive.ubuntu.com/ubuntu noble-updates/restricted amd64 Components [159 B] Get:22 http://archive.ubuntu.com/ubuntu noble-updates/multiverse amd64 Packages [35.9 kB] Get:23 http://archive.ubuntu.com/ubuntu noble-updates/multiverse amd64 Components [887 B] Get:24 http://archive.ubuntu.com/ubuntu noble-backports/main amd64 Packages [49.5 kB] Get:25 http://archive.ubuntu.com/ubuntu noble-backports/main amd64 Components [8100 B] Get:26 http://archive.ubuntu.com/ubuntu noble-backports/universe amd64 Packages [34.6 kB] Get:27 http://archive.ubuntu.com/ubuntu noble-backports/universe amd64 Components [11.3 kB] Get:28 http://archive.ubuntu.com/ubuntu noble-backports/restricted amd64 Components [160 B] Get:29 http://archive.ubuntu.com/ubuntu noble-backports/multiverse amd64 Components [162 B] Fetched 21.1 MB in 3s (6362 kB/s) Reading package lists... [rtd-command-info] start-time: 2026-01-12T20:14:47.258323Z, end-time: 2026-01-12T20:15:19.310278Z, duration: 32, exit-code: 0 apt-get install --assume-yes --quiet -- graphviz Reading package lists... Building dependency tree... Reading state information... The following additional packages will be installed: fonts-liberation fonts-liberation-sans-narrow fonts-liberation2 libann0 libcdt5 libcgraph6 libgraphviz-dev libgvc6 libgvc6-plugins-gtk libgvpr2 liblab-gamut1 libpathplan4 libxdot4 Suggested packages: gsfonts graphviz-doc The following NEW packages will be installed: fonts-liberation fonts-liberation-sans-narrow fonts-liberation2 graphviz libann0 The following packages will be upgraded: libcdt5 libcgraph6 libgraphviz-dev libgvc6 libgvc6-plugins-gtk libgvpr2 liblab-gamut1 libpathplan4 libxdot4 9 upgraded, 5 newly installed, 0 to remove and 332 not upgraded. Need to get 5447 kB of archives. After this operation, 7454 kB of additional disk space will be used. Get:1 http://archive.ubuntu.com/ubuntu noble/main amd64 fonts-liberation all 1:2.1.5-3 [1603 kB] Get:2 http://archive.ubuntu.com/ubuntu noble/main amd64 fonts-liberation-sans-narrow all 1:1.07.6-4 [197 kB] Get:3 http://archive.ubuntu.com/ubuntu noble/universe amd64 fonts-liberation2 all 1:2.1.5-3 [3418 B] Get:4 http://archive.ubuntu.com/ubuntu noble/universe amd64 libann0 amd64 1.1.2+doc-9build1 [25.5 kB] Get:5 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 libgraphviz-dev amd64 2.42.2-9ubuntu0.1 [58.0 kB] Get:6 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 libcgraph6 amd64 2.42.2-9ubuntu0.1 [44.6 kB] Get:7 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 libpathplan4 amd64 2.42.2-9ubuntu0.1 [24.0 kB] Get:8 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 libgvc6 amd64 2.42.2-9ubuntu0.1 [716 kB] Get:9 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 libgvpr2 amd64 2.42.2-9ubuntu0.1 [187 kB] Get:10 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 libxdot4 amd64 2.42.2-9ubuntu0.1 [16.6 kB] Get:11 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 liblab-gamut1 amd64 2.42.2-9ubuntu0.1 [1886 kB] Get:12 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 libgvc6-plugins-gtk amd64 2.42.2-9ubuntu0.1 [21.0 kB] Get:13 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 libcdt5 amd64 2.42.2-9ubuntu0.1 [21.6 kB] Get:14 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 graphviz amd64 2.42.2-9ubuntu0.1 [642 kB] debconf: delaying package configuration, since apt-utils is not installed Fetched 5447 kB in 2s (3459 kB/s) Selecting previously unselected package fonts-liberation. (Reading database ... (Reading database ... 5% (Reading database ... 10% (Reading database ... 15% (Reading database ... 20% (Reading database ... 25% (Reading database ... 30% (Reading database ... 35% (Reading database ... 40% (Reading database ... 45% (Reading database ... 50% (Reading database ... 55% (Reading database ... 60% (Reading database ... 65% (Reading database ... 70% (Reading database ... 75% (Reading database ... 80% (Reading database ... 85% (Reading database ... 90% (Reading database ... 95% (Reading database ... 100% (Reading database ... 302309 files and directories currently installed.) Preparing to unpack .../00-fonts-liberation_1%3a2.1.5-3_all.deb ... Unpacking fonts-liberation (1:2.1.5-3) ... Selecting previously unselected package fonts-liberation-sans-narrow. Preparing to unpack .../01-fonts-liberation-sans-narrow_1%3a1.07.6-4_all.deb ... Unpacking fonts-liberation-sans-narrow (1:1.07.6-4) ... Selecting previously unselected package fonts-liberation2. 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Preparing to unpack .../09-libxdot4_2.42.2-9ubuntu0.1_amd64.deb ... Unpacking libxdot4:amd64 (2.42.2-9ubuntu0.1) over (2.42.2-9build1) ... Preparing to unpack .../10-liblab-gamut1_2.42.2-9ubuntu0.1_amd64.deb ... Unpacking liblab-gamut1:amd64 (2.42.2-9ubuntu0.1) over (2.42.2-9build1) ... Preparing to unpack .../11-libgvc6-plugins-gtk_2.42.2-9ubuntu0.1_amd64.deb ... Unpacking libgvc6-plugins-gtk (2.42.2-9ubuntu0.1) over (2.42.2-9build1) ... Preparing to unpack .../12-libcdt5_2.42.2-9ubuntu0.1_amd64.deb ... Unpacking libcdt5:amd64 (2.42.2-9ubuntu0.1) over (2.42.2-9build1) ... Selecting previously unselected package graphviz. Preparing to unpack .../13-graphviz_2.42.2-9ubuntu0.1_amd64.deb ... Unpacking graphviz (2.42.2-9ubuntu0.1) ... Setting up libxdot4:amd64 (2.42.2-9ubuntu0.1) ... Setting up liblab-gamut1:amd64 (2.42.2-9ubuntu0.1) ... Setting up libpathplan4:amd64 (2.42.2-9ubuntu0.1) ... Setting up libann0 (1.1.2+doc-9build1) ... Setting up fonts-liberation (1:2.1.5-3) ... Setting up libcdt5:amd64 (2.42.2-9ubuntu0.1) ... Setting up libcgraph6:amd64 (2.42.2-9ubuntu0.1) ... Setting up fonts-liberation-sans-narrow (1:1.07.6-4) ... Setting up fonts-liberation2 (1:2.1.5-3) ... Setting up libgvc6 (2.42.2-9ubuntu0.1) ... Setting up libgvc6-plugins-gtk (2.42.2-9ubuntu0.1) ... Setting up libgvpr2:amd64 (2.42.2-9ubuntu0.1) ... Setting up graphviz (2.42.2-9ubuntu0.1) ... Setting up libgraphviz-dev:amd64 (2.42.2-9ubuntu0.1) ... Processing triggers for libc-bin (2.39-0ubuntu8.2) ... Processing triggers for fontconfig (2.15.0-1.1ubuntu2) ... [rtd-command-info] start-time: 2026-01-12T20:15:23.929520Z, end-time: 2026-01-12T20:15:24.090517Z, duration: 0, exit-code: 0 asdf global python 3.11.12 [rtd-command-info] start-time: 2026-01-12T20:15:24.734195Z, end-time: 2026-01-12T20:15:25.997499Z, duration: 1, exit-code: 0 python -mvirtualenv $READTHEDOCS_VIRTUALENV_PATH created virtual environment CPython3.11.12.final.0-64 in 776ms creator CPython3Posix(dest=/home/docs/checkouts/readthedocs.org/user_builds/xanaduai-pennylane/envs/latest, clear=False, no_vcs_ignore=False, global=False) seeder FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/home/docs/.local/share/virtualenv) added seed packages: pip==23.1, setuptools==67.6.1, wheel==0.40.0 activators BashActivator,CShellActivator,FishActivator,NushellActivator,PowerShellActivator,PythonActivator [rtd-command-info] start-time: 2026-01-12T20:15:26.086493Z, end-time: 2026-01-12T20:15:33.593591Z, duration: 7, exit-code: 0 python -m pip install --upgrade --no-cache-dir pip setuptools Requirement already satisfied: pip in /home/docs/checkouts/readthedocs.org/user_builds/xanaduai-pennylane/envs/latest/lib/python3.11/site-packages (23.1) Collecting pip Downloading pip-25.3-py3-none-any.whl (1.8 MB) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.8/1.8 MB 38.8 MB/s eta 0:00:00 Requirement already satisfied: setuptools in /home/docs/checkouts/readthedocs.org/user_builds/xanaduai-pennylane/envs/latest/lib/python3.11/site-packages (67.6.1) Collecting setuptools Downloading setuptools-80.9.0-py3-none-any.whl (1.2 MB) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.2/1.2 MB 113.3 MB/s eta 0:00:00 Installing collected packages: setuptools, pip Attempting uninstall: setuptools Found existing installation: setuptools 67.6.1 Uninstalling setuptools-67.6.1: Successfully uninstalled setuptools-67.6.1 Attempting uninstall: pip Found existing installation: pip 23.1 Uninstalling pip-23.1: Successfully uninstalled pip-23.1 Successfully installed pip-25.3 setuptools-80.9.0 [rtd-command-info] start-time: None, end-time: None, duration: None, exit-code: None python -m pip install --upgrade --no-cache-dir sphinx