TypeError: load() missing 1 required positional argument: 'Loader'
Metadata
Current evaluation
Snapcraft 2.43.1 deb crashes with "TypeError: load() missing 1 required positional argument: 'Loader'" in states/_state.py; Loader-less yaml.load call since fixed, and the reporter confirmed their core18 CI image was the trigger.
Suggested action: close resolved
Reason: The exact failing call (states/_state.py `yaml.load(f.read())` with no Loader, requiring PyYAML >= 5.1) was changed by commit 2e6ed7fd1 "yaml: replace yaml.safe_load() with CSafeLoader (#2218)" — pickaxe on `yaml.load(f.read())` and the file history for snapcraft/internal/states/_state.py both return that commit, and the current tree has no Loader-less yaml.load calls. The affected snapcraft 2.x/core18 deb code no longer exists at all (removed in ffb164b7a "chore: remove snapcraft_legacy"), and the reporter's last comment concludes the failure came from their Docker core18 image needing snapcraft installed, not from duplicity. Impact is limited because Ubuntu 18.04/core18 and the 2.x deb are EOL.
Evaluated by: mr-cal-bot
Impact:
28
Quick Win:
17
Complexity:
15
Confidence:
78
Actionability:
70
Issue body
Bad ending while trying to build duplicity snap on GitLab.
Sorry, an error occurred in Snapcraft:
We would appreciate it if you created a bug report at
https://launchpad.net/snapcraft/+filebug with the above text included.
Traceback (most recent call last):
File "/usr/bin/snapcraft", line 11, in <module>
load_entry_point('snapcraft==2.43.1+18.4.1', 'console_scripts', 'snapcraft')()
File "/usr/lib/python3/dist-packages/click/core.py", line 722, in __call__
return self.main(*args, **kwargs)
File "/usr/lib/python3/dist-packages/click/core.py", line 697, in main
rv = self.invoke(ctx)
File "/usr/lib/python3/dist-packages/click/core.py", line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/lib/python3/dist-packages/click/core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/lib/python3/dist-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/usr/lib/python3/dist-packages/snapcraft/cli/lifecycle.py", line 136, in snap
project = _execute(steps.PRIME, parts=[], **kwargs)
File "/usr/lib/python3/dist-packages/snapcraft/cli/lifecycle.py", line 35, in _execute
lifecycle.execute(step, project_config, parts)
File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle/_runner.py", line 90, in execute
executor.run(step, part_names)
File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle/_runner.py", line 196, in run
self._create_meta(step, processed_part_names)
File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle/_runner.py", line 354, in _create_meta
common.env = self.config.snap_env()
File "/usr/lib/python3/dist-packages/snapcraft/internal/project_loader/_config.py", line 289, in snap_env
dependency_paths |= part.get_primed_dependency_paths()
File "/usr/lib/python3/dist-packages/snapcraft/internal/pluginhandler/__init__.py", line 885, in get_primed_dependency_paths
state = self.get_prime_state()
File "/usr/lib/python3/dist-packages/snapcraft/internal/pluginhandler/__init__.py", line 144, in get_prime_state
self._prime_state = cast(states.PrimeState, self.get_state(steps.PRIME))
File "/usr/lib/python3/dist-packages/snapcraft/internal/pluginhandler/__init__.py", line 148, in get_state
return states.get_state(self.plugin.statedir, step)
File "/usr/lib/python3/dist-packages/snapcraft/internal/states/_state.py", line 96, in get_state
state = yaml.load(f.read())
TypeError: load() missing 1 required positional argument: 'Loader'
Evaluation history
| Date | Model | Scores | Action | Summary |
|---|---|---|---|---|
| stealth/space-bunny-alpha |
Impact:
28
Quick Win:
17
Complexity:
15
Confidence:
78
Actionability:
70
|
close resolved | Snapcraft 2.43.1 deb crashes with "TypeError: load() missing 1 required positional argument: 'Loader'" in states/_state.py; Loader-less yaml.load call since fixed, and the reporter confirmed their core18 CI image was the trigger. | |
| stealth/space-bunny-alpha |
Impact:
20
Quick Win:
12
Complexity:
15
Confidence:
72
Actionability:
70
|
close not a bug | PyYAML 6 TypeError crashing snapcraft 2.43.1 deb state loading on core18; reporter traced it to their GitLab Docker image lacking Snapcraft, not a snapcraft defect. Untriaged upstream, idle since 2022. | |
| stealth/space-bunny-alpha |
Impact:
22
Quick Win:
14
Complexity:
12
Confidence:
76
Actionability:
72
|
close stale | Snapcraft 2.43 deb on core18 crashes with "load() missing 1 required positional argument: 'Loader'" (PyYAML 6) in internal/states/_state.py. Reporter worked around it via Docker image; the legacy code path has since been deleted from the tree. | |
| stealth/space-bunny-alpha |
Impact:
35
Quick Win:
24
Complexity:
22
Confidence:
93
Actionability:
89
|
close not a bug | Snapcraft 2.43.1 crashed in the reporter’s core18 GitLab image while loading PyYAML state; investigation attributed it to the CI image rather than Duplicity. | |
| stealth/space-bunny-alpha |
Impact:
25
Quick Win:
20
Complexity:
10
Confidence:
96
Actionability:
88
|
close stale | Snapcraft 2.43.1 crashes in a core18 Docker build due to a PyYAML Loader API mismatch; the legacy code path has since been removed from current Snapcraft. | |
| stealth/space-bunny-alpha |
Impact:
24
Quick Win:
19
Complexity:
12
Confidence:
94
Actionability:
88
|
close resolved | Snapcraft 2.43.1 crashes in state loading under incompatible PyYAML. The faulty call was removed after the legacy state package was deleted, so it no longer affects current Snapcraft. | |
| qwen/qwen3.8-27b |
Impact:
15
Quick Win:
13
Staleness:
95
Complexity:
15
Confidence:
80
Support Request:
10
|
close stale | Snapcraft 2.43.1 crashes during snap build with PyYAML TypeError (load() missing Loader) in internal/states/_state.py. No maintainer interaction for ~4.5 years; the affected code path no longer exists in the current codebase. | |
| qwen/qwen3.6-35b-a3b |
Staleness:
95
Complexity:
20
Confidence:
90
Support Request:
10
|
close stale | Snapcraft 2.43.1 crashes with a PyYAML load() missing Loader argument error during snap builds. Issue has been inactive for over 4 years and affects a long-deprecated version. | |
| qwen/qwen3.6-35b-a3b |
Staleness:
98
Complexity:
10
Confidence:
95
Support Request:
10
|
close stale | Reports a PyYAML yaml.load() TypeError during Snapcraft 2.43.1 builds. Unaddressed for over 4 years. The error stems from Python 3.8+ breaking changes in PyYAML, and the affected Snapcraft version is long obsolete. | |
| qwen3.6-35b-a3b-mtp-q6 |
Staleness:
95
Complexity:
20
Confidence:
90
Support Request:
0
|
close stale | Snapcraft 2.43.1 build fails with PyYAML load() missing Loader argument. Over 4 years old, no maintainer interaction, and references a long-deprecated version. |
Update history
| Date | Change |
|---|---|
| created |
Related work
-
Likely Fixed By:
canonical/snapcraft#2218
(confidence 85%)
Commit 2e6ed7fd1 (PR #2218) is the change that introduced an explicit Loader/CSafeLoader for state-file YAML loading, addressing the reported TypeError.
Related issues
No related issues found above the similarity threshold.