Identical `parts` in different snaps contain different contents

Metadata

Project: snapcraft
Number: #4541
Type: issue
State: open
Author: dilyn-corner
Labels: —
Created: 2024-01-24 09:13 PM UTC
Updated: 2025-03-13 06:36 PM UTC
Closed: —

Current evaluation

Bug report: identical `parts` (e.g. a `netplan` nil-plugin part with the same stage-packages) in two different snaps produce different `parts/<part>/` contents (build/install/src/stage_packages). Reported on snapcraft 10445 with base core24 in a 23.10 VM; author later noted they could not reproduce with base core22 in a Jammy VM. Open, no labels, no maintainer response.

Suggested action: needs triage

Reason: No labels, no assignee, and no maintainer acknowledgement — the only comment is the reporter's own note (2024-02-06) that they could not reproduce with base core22 in a Jammy VM. The reproduction is heavy (LXD VM, destructive-mode, a specific external repo/branch) and the reporter's own follow-up weakens the case, so a maintainer needs to assess whether this is a real core24-era bug or an environment artifact before any close/keep decision.

Impact: 45 Quick Win: 13.5 Staleness: 78 Complexity: 70 Confidence: 55 Support Request: 10

Issue body

### Bug Description When a part `foo` in a snap is copied to another different snap, different content will be found in both snap's `parts/foo/` directories, namely contents in `{build,install,src,stage_packages}`. ### To Reproduce Perform the following actions. <details> <summary>nb</summary> <br> Similar steps for reproduction probably exist, but this is the example I was given :) For the example in question, `mknod` usage is required -- this is only possible when using a privileged container or, as we do here, a VM. This will be default use KVM, but I don't think there's a particular reason to choose LXD as the VM host. QEMU should work, or a laptop you don't particularly enjoy running 23.10 :) We're building a `base: core24` snap in a 23.10 VM using `--destructive-mode` -- these were the conditions under which the issue was first observed. There may be simpler reproduction instructions (e.g. snapcraft 7.x using `base: core22`) but these have not (yet) been tested. </details> ```shell lxc launch ubuntu:23.10 testing-vm --vm lxc shell testing-vm apt update snap install --revision 10445 --classic snapcraft git clone -b nucleus --depth 1 https://github.com/kubiko/core-base cd core-base snapcraft --destructive-mode ``` The build may fail at some part but that shouldn't matter so much in this case; the `netplan` part should be fully built/prime/staged at that point anyways. Create a netplan snap using the `snapcraft.yaml` as specified in the later section, and run the build with the same command. That build will probably also fail, or time out, or something. That's fine, the `parts/netplan/stage_packages` directory should exist at that point. Compare the two `parts/netplan` directories. ### Environment Ubuntu 23.10 VM stood up with LXD snapcraft revision 10445 ### snapcraft.yaml ```shell name: netplan version: "0.2" summary: Netplan description: | Netplan confinement: strict type: app base: core24 grade: stable parts: netplan: plugin: nil stage-packages: - libnetplan0 - libpython3-stdlib - libpython3.11-minimal - libpython3.11-stdlib - netplan.io - python3.11-minimal - python3-minimal - python3 - python3-dbus - python3-netifaces - python3-yaml ``` ### Relevant log output <details> <summary>core-base snap</summary> <br> ```shell root@testing-vm:~/core-base# ls -lh parts/netplan/stage_packages/ total 29M -rw-r--r-- 2 root root 123K Jan 9 2023 debconf_1.5.82_all.deb -rw-r--r-- 2 root root 1.4M Aug 31 21:47 dpkg_1.22.0ubuntu1_amd64.deb -rw-r--r-- 2 root root 43K Sep 24 18:13 gcc-13-base_13.2.0-4ubuntu3_amd64.deb -rw-r--r-- 2 root root 1.1M Feb 14 2023 iproute2_6.1.0-1ubuntu2_amd64.deb -rw-r--r-- 2 root root 17K Jan 18 2023 libacl1_2.3.1-3_amd64.deb -rw-r--r-- 2 root root 47K Sep 23 06:09 libapparmor1_4.0.0~alpha2-0ubuntu5_amd64.deb -rw-r--r-- 2 root root 20K May 2 2023 libargon2-1_0~20190702+dfsg-3_amd64.deb -rw-r--r-- 2 root root 5.3K Jul 10 2023 libaudit-common_3.1.1-1_all.deb -rw-r--r-- 2 root root 46K Jul 10 2023 libaudit1_3.1.1-1_amd64.deb -rw-r--r-- 2 root root 119K Oct 7 10:59 libblkid1_2.39.1-4ubuntu2_amd64.deb -rw-r--r-- 2 root root 155K Aug 4 23:24 libbpf1_1.2.2-2_amd64.deb -rw-r--r-- 2 root root 41K Mar 9 2023 libbsd0_0.11.7-4_amd64.deb -rw-r--r-- 2 root root 34K Mar 24 2022 libbz2-1.0_1.0.8-5build1_amd64.deb -rw-r--r-- 2 root root 3.1M Oct 3 19:58 libc6_2.38-1ubuntu6_amd64.deb -rw-r--r-- 2 root root 15K Feb 28 2023 libcap-ng0_0.8.3-1build2_amd64.deb -rw-r--r-- 2 root root 34K May 26 2023 libcap2-bin_2.66-4ubuntu1_amd64.deb -rw-r--r-- 2 root root 29K May 26 2023 libcap2_2.66-4ubuntu1_amd64.deb -rw-r--r-- 2 root root 22K Jul 26 19:42 libcom-err2_1.47.0-2ubuntu1_amd64.deb -rw-r--r-- 2 root root 81K Jul 29 23:39 libcrypt1_4.4.36-2_amd64.deb -rw-r--r-- 2 root root 237K Sep 12 12:20 libcryptsetup12_2.6.1-4ubuntu3_amd64.deb -rw-r--r-- 2 root root 720K Aug 6 23:44 libdb5.3_5.3.28+dfsg2-2_amd64.deb -rw-r--r-- 2 root root 204K Sep 15 13:14 libdbus-1-3_1.14.10-1ubuntu1_amd64.deb -rw-r--r-- 2 root root 136K Jun 8 2023 libdevmapper1.02.1_1.02.185-2ubuntu1_amd64.deb -rw-r--r-- 2 root root 55K Jul 5 2023 libelf1_0.189-4_amd64.deb -rw-r--r-- 2 root root 84K Jun 15 2023 libexpat1_2.5.0-2_amd64.deb -rw-r--r-- 2 root root 142K Oct 7 10:59 libfdisk1_2.39.1-4ubuntu2_amd64.deb -rw-r--r-- 2 root root 24K Nov 6 2022 libffi8_3.4.4-1_amd64.deb -rw-r--r-- 2 root root 61K Sep 24 18:13 libgcc-s1_13.2.0-4ubuntu3_amd64.deb -rw-r--r-- 2 root root 520K Oct 2 17:16 libgcrypt20_1.10.2-3ubuntu1_amd64.deb -rw-r--r-- 2 root root 1.5M Sep 18 00:04 libglib2.0-0_2.78.0-2_amd64.deb -rw-r--r-- 2 root root 69K Aug 15 17:19 libgpg-error0_1.47-2_amd64.deb -rw-r--r-- 2 root root 139K Aug 24 19:09 libgssapi-krb5-2_1.20.1-3ubuntu1_amd64.deb -rw-r--r-- 2 root root 22K Jul 21 2023 libip4tc2_1.8.9-2ubuntu2_amd64.deb -rw-r--r-- 2 root root 35K Aug 16 23:46 libjson-c5_0.17-1_amd64.deb -rw-r--r-- 2 root root 80K Aug 24 19:09 libk5crypto3_1.20.1-3ubuntu1_amd64.deb -rw-r--r-- 2 root root 9.2K Dec 20 2022 libkeyutils1_1.6.3-2_amd64.deb -rw-r--r-- 2 root root 51K Aug 22 16:43 libkmod2_30+20230519-1ubuntu3_amd64.deb -rw-r--r-- 2 root root 338K Aug 24 19:09 libkrb5-3_1.20.1-3ubuntu1_amd64.deb -rw-r--r-- 2 root root 33K Aug 24 19:09 libkrb5support0_1.20.1-3ubuntu1_amd64.deb -rw-r--r-- 2 root root 62K Nov 6 2022 liblz4-1_1.9.4-1_amd64.deb -rw-r--r-- 2 root root 123K Feb 13 2023 liblzma5_5.4.1-0.2_amd64.deb -rw-r--r-- 2 root root 27K Jun 14 2023 libmd0_1.1.0-1_amd64.deb -rw-r--r-- 2 root root 13K Aug 4 2022 libmnl0_1.0.4-3ubuntu1_amd64.deb -rw-r--r-- 2 root root 130K Oct 7 10:59 libmount1_2.39.1-4ubuntu2_amd64.deb -rw-r--r-- 2 root root 146K Jul 24 2023 libncursesw6_6.4+20230625-2_amd64.deb -rw-r--r-- 3 root root 118K Nov 21 10:35 libnetplan0_0.107-5ubuntu0.2_amd64.deb -rw-r--r-- 2 root root 42K Mar 24 2022 libnsl2_1.3.0-2build2_amd64.deb -rw-r--r-- 2 root root 294K Aug 21 23:14 libp11-kit0_0.25.0-4ubuntu1_amd64.deb -rw-r--r-- 2 root root 65K Jan 17 18:10 libpam0g_1.5.2-6ubuntu1.1_amd64.deb -rw-r--r-- 2 root root 223K Aug 30 11:35 libpcre2-8-0_10.42-4_amd64.deb -rw-r--r-- 3 root root 9.3K Jul 5 2023 libpython3-stdlib_3.11.4-5_amd64.deb -rw-r--r-- 3 root root 820K Oct 8 15:24 libpython3.11-minimal_3.11.6-3_amd64.deb -rw-r--r-- 3 root root 1.9M Oct 8 15:24 libpython3.11-stdlib_3.11.6-3_amd64.deb -rw-r--r-- 2 root root 148K Jan 14 2023 libreadline8_8.2-1.3_amd64.deb -rw-r--r-- 2 root root 48K Feb 28 2023 libseccomp2_2.5.4-1ubuntu3_amd64.deb -rw-r--r-- 2 root root 77K Jul 10 2023 libselinux1_3.5-1_amd64.deb -rw-r--r-- 2 root root 62K Oct 7 10:59 libsmartcols1_2.39.1-4ubuntu2_amd64.deb -rw-r--r-- 2 root root 656K Jan 3 18:06 libsqlite3-0_3.42.0-1ubuntu0.1_amd64.deb -rw-r--r-- 2 root root 1.9M Oct 24 15:30 libssl3_3.0.10-1ubuntu2.1_amd64.deb -rw-r--r-- 2 root root 1.8M Oct 26 15:44 libsystemd-shared_253.5-1ubuntu6.1_amd64.deb -rw-r--r-- 2 root root 399K Oct 26 15:44 libsystemd0_253.5-1ubuntu6.1_amd64.deb -rw-r--r-- 2 root root 106K Jul 24 2023 libtinfo6_6.4+20230625-2_amd64.deb -rw-r--r-- 2 root root 7.7K Aug 11 2022 libtirpc-common_1.3.3+ds-1_all.deb -rw-r--r-- 2 root root 79K Aug 11 2022 libtirpc3_1.3.3+ds-1_amd64.deb -rw-r--r-- 2 root root 157K Oct 26 15:44 libudev1_253.5-1ubuntu6.1_amd64.deb -rw-r--r-- 2 root root 33K Oct 7 10:59 libuuid1_2.39.1-4ubuntu2_amd64.deb -rw-r--r-- 2 root root 34K Jul 21 2023 libxtables12_1.8.9-2ubuntu2_amd64.deb -rw-r--r-- 2 root root 52K Jul 16 2022 libyaml-0-2_0.2.5-1_amd64.deb -rw-r--r-- 2 root root 288K Jul 6 2023 libzstd1_1.5.5+dfsg2-1ubuntu2_amd64.deb -rw-r--r-- 2 root root 27K Jul 14 2023 media-types_10.1.0_all.deb -rw-r--r-- 2 root root 115K Oct 7 10:59 mount_2.39.1-4ubuntu2_amd64.deb -rw-r--r-- 2 root root 57K Nov 21 10:35 netplan-generator_0.107-5ubuntu0.2_amd64.deb -rw-r--r-- 3 root root 54K Nov 21 10:35 netplan.io_0.107-5ubuntu0.2_amd64.deb -rw-r--r-- 2 root root 75K Mar 1 2023 python3-cffi-backend_1.15.1-5build1_amd64.deb -rw-r--r-- 3 root root 97K Jul 26 17:44 python3-dbus_1.3.2-5_amd64.deb -rw-r--r-- 2 root root 57K Jun 19 2023 python3-markdown-it_3.0.0-2_all.deb -rw-r--r-- 2 root root 9.5K Nov 6 2022 python3-mdurl_0.1.2-1_all.deb -rw-r--r-- 3 root root 27K Jul 5 2023 python3-minimal_3.11.4-5_amd64.deb -rw-r--r-- 3 root root 18K Mar 1 2023 python3-netifaces_0.11.0-2build1_amd64.deb -rw-r--r-- 2 root root 22K Nov 21 10:35 python3-netplan_0.107-5ubuntu0.2_amd64.deb -rw-r--r-- 2 root root 164K Oct 4 10:04 python3-pkg-resources_68.1.2-2_all.deb -rw-r--r-- 2 root root 802K May 2 2023 python3-pygments_2.15.1+dfsg-1_all.deb -rw-r--r-- 2 root root 184K Sep 16 00:04 python3-rich_13.3.1-2_all.deb -rw-r--r-- 3 root root 119K Jul 23 2023 python3-yaml_6.0.1-1_amd64.deb -rw-r--r-- 3 root root 2.1M Oct 8 15:24 python3.11-minimal_3.11.6-3_amd64.deb -rw-r--r-- 2 root root 566K Oct 8 15:24 python3.11_3.11.6-3_amd64.deb -rw-r--r-- 3 root root 23K Jul 5 2023 python3_3.11.4-5_amd64.deb -rw-r--r-- 2 root root 55K Jan 14 2023 readline-common_8.2-1.3_all.deb -rw-r--r-- 2 root root 78K Oct 26 15:44 systemd-dev_253.5-1ubuntu6.1_all.deb -rw-r--r-- 2 root root 3.0M Oct 26 15:44 systemd_253.5-1ubuntu6.1_amd64.deb -rw-r--r-- 2 root root 286K Dec 10 23:50 tar_1.34+dfsg-1.2ubuntu1.1_amd64.deb -rw-r--r-- 2 root root 268K Jan 6 00:18 tzdata_2023d-0ubuntu0.23.10_all.deb -rw-r--r-- 2 root root 62K Aug 3 10:29 zlib1g_1.2.13.dfsg-1ubuntu5_amd64.deb ``` </details> <details> <summary>netplan snap</summary> <br> ```shell root@testing-vm:~/core-base# ls -lh netplan/parts/netplan/stage_packages/ total 5.2M -rw-r--r-- 3 root root 118K Nov 21 10:35 libnetplan0_0.107-5ubuntu0.2_amd64.deb -rw-r--r-- 3 root root 9.3K Jul 5 2023 libpython3-stdlib_3.11.4-5_amd64.deb -rw-r--r-- 3 root root 820K Oct 8 15:24 libpython3.11-minimal_3.11.6-3_amd64.deb -rw-r--r-- 3 root root 1.9M Oct 8 15:24 libpython3.11-stdlib_3.11.6-3_amd64.deb -rw-r--r-- 3 root root 54K Nov 21 10:35 netplan.io_0.107-5ubuntu0.2_amd64.deb -rw-r--r-- 3 root root 97K Jul 26 17:44 python3-dbus_1.3.2-5_amd64.deb -rw-r--r-- 3 root root 27K Jul 5 2023 python3-minimal_3.11.4-5_amd64.deb -rw-r--r-- 3 root root 18K Mar 1 2023 python3-netifaces_0.11.0-2build1_amd64.deb -rw-r--r-- 3 root root 119K Jul 23 2023 python3-yaml_6.0.1-1_amd64.deb -rw-r--r-- 3 root root 2.1M Oct 8 15:24 python3.11-minimal_3.11.6-3_amd64.deb -rw-r--r-- 3 root root 23K Jul 5 2023 python3_3.11.4-5_amd64.deb ``` </details> ### Additional context _No response_

Evaluation history

Date	Model	Scores	Action	Summary
2026-09-01 03:31 AM UTC	qwen/qwen3.8-27b	Impact: 45 Quick Win: 13.5 Staleness: 78 Complexity: 70 Confidence: 55 Support Request: 10	needs triage	Bug report: identical `parts` (e.g. a `netplan` nil-plugin part with the same stage-packages) in two different snaps produce different `parts/<part>/` contents (build/install/src/stage_packages). Reported on snapcraft 10445 with base core24 in a 23.10 VM; author later noted they could not reproduce with base core22 in a Jammy VM. Open, no labels, no maintainer response.
2026-07-22 12:15 PM UTC	qwen/qwen3.6-35b-a3b	Staleness: 90 Complexity: 40 Confidence: 60 Support Request: 30	close stale	Reports identical parts in different snaps having different contents, specifically stage_packages. Author could not reproduce with core22. Issue is very old with no maintainer response.
2026-07-08 07:19 PM UTC	qwen3.6-35b-a3b-mtp-q6	Staleness: 85 Complexity: 55 Confidence: 70 Support Request: 10	close stale	Identical snap parts contain different stage_packages during builds. Untriaged, over two years old, with author noting non-reproducibility on core22.
2026-06-17 01:29 AM UTC	qwen3.6-35b-a3b-mtp-q6	Staleness: 90 Complexity: 65 Confidence: 75 Support Request: 25	close stale	Identical snap parts yield different directory contents across separate builds. Affects core24 with snapcraft 7.x. Open, inactive for over a year, needs triage to determine if base-specific or environment-dependent.

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