Go plugin environment validation fails if toolchain downloads a new version
Metadata
Current evaluation
Go plugin env validation fails when `go version` triggers toolchain auto-download; stderr download message is parsed as the version. Root cause is in craft-parts validator; duplicate craft-parts#1447 is open.
Suggested action: needs triage
Reason: The issue has no labels, comments, or maintainer assessment in rockcraft, so it has not been triaged. The log clearly shows `go: downloading go1.24.4` being treated as the compiler version, and craft-parts' `validate_dependency` returns stderr preferentially, confirming the root cause; the same bug is tracked in canonical/craft-parts#1447.
Evaluated by: mr-cal-bot
Impact:
60
Quick Win:
36
Complexity:
25
Confidence:
85
Actionability:
80
Issue body
### Bug Description
The Go plugin's validation step will fail if the go toolchain downloads a version different from that of the bundled Go toolchain. This seems to be due to `rockcraft` being unable to correctly parse the output if go is in the middle of pulling a different toolchain version.
The workaround I've found is to set `GOTOOLCHAIN: local` (though this does only work if your application will work with gotoolchain set as local) or to run `rockcraft pack` twice, as the correct toolchain will be local in the build environment on the second call. The latter workaround, while fine for development environments, is not all that viable for CI workflows.
### To Reproduce
Start with a go project which targets a toolchain version that differs from what would be available locally. For example, in `go.mod`:
```
go 1.24.0
toolchain go1.24.4
```
Then have a part using the `go` plugin while using a go dependency that doesn't match with the requested toolchain version. For example, the build-snap `go/1.24/stable` (At the time of writing, the snap is still at 1.24.2).
```
web-service:
plugin: go
source: .
source-subdir: cmd/web-service
build-snaps:
- go/1.24/stable
stage:
- bin/web-service
```
Run
```
rockcraft clean
rockcraft pack
```
### Environment
I'm running within a Multipass Ubuntu 24.04.02 instance
rockcraft 1.12.0
This issue also occurs if using the `canonical/craft-actions/rockcraft-pack@main` workflow on an `ubuntu-24.04` GitHub runner.
### rockcraft.yaml
```yaml
name: ubuntu-insights-services
base: ubuntu@24.04
version: "0.17" # just for humans. Semantic versioning is recommended
license: GPL-3.0
summary: Service for ubuntu-insights # 79 char long summary
description: |
Ubuntu Insights services used for accepting HTTP requests with insights reports from clients, validating them, and inserting them into a
database. This service is part of the Ubuntu Insights project, a transparent, user-friendly, open,
platform-agnostic, and cross-application solution for reporting hardware information and other collected metrics.
# the platforms this rock should be built on and run on.
# you can check your architecture with `dpkg --print-architecture`
platforms:
amd64:
services:
web-service:
override: replace
command: web-service
startup: disabled
ingest-service:
override: replace
command: ingest-service
startup: disabled
run-user: _daemon_ # setting a non-root user for the rock
parts:
web-service:
plugin: go
source: .
source-subdir: cmd/web-service
build-snaps:
- go/1.24/stable
stage:
- bin/web-service
ingest-service:
plugin: go
source: .
source-subdir: cmd/ingest-service
build-snaps:
- go/1.24/stable
stage:
- bin/ingest-service
migrations:
plugin: dump
source: .
source-subdir: migrations
organize:
"*": usr/share/insights/migrations/
stage:
- usr/share/insights/migrations/*
golang-migrate:
plugin: dump
source: https://github.com/golang-migrate/migrate/releases/download/v4.18.3/migrate.linux-amd64.deb
source-type: deb
```
### Relevant log output
```shell
## Plugin environment
export GOBIN="/root/parts/ingest-service/install/bin"
## User environment
2025-06-18 13:50:12.657 plugin validation command: 'go version'
2025-06-18 13:50:17.291 executed go version with output go: downloading go1.24.4 (linux/amd64)
2025-06-18 13:50:17.291 Environment validation failed for part 'ingest-service': invalid go compiler version 'go: downloading go1.24.4 (linux/amd64)'.
2025-06-18 13:50:17.294 Traceback (most recent call last):
2025-06-18 13:50:17.294 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_application/services/lifecycle.py", line 305, in run
2025-06-18 13:50:17.294 with self._lcm.action_executor() as aex:
2025-06-18 13:50:17.294 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_parts/executor/executor.py", line 306, in __enter__
2025-06-18 13:50:17.294 self._executor.prologue()
2025-06-18 13:50:17.294 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_parts/executor/executor.py", line 91, in prologue
2025-06-18 13:50:17.294 self._verify_plugin_environment()
2025-06-18 13:50:17.294 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_parts/executor/executor.py", line 292, in _verify_plugin_environment
2025-06-18 13:50:17.294 validator.validate_environment(part_dependencies=part.dependencies)
2025-06-18 13:50:17.294 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_parts/plugins/go_plugin.py", line 72, in validate_environment
2025-06-18 13:50:17.295 raise errors.PluginEnvironmentValidationError(
2025-06-18 13:50:17.295 craft_parts.errors.PluginEnvironmentValidationError: Environment validation failed for part 'ingest-service': invalid go compiler version 'go: downloading go1.24.4 (linux/amd64)'.
2025-06-18 13:50:17.403 Emitter: Resuming control of the terminal
2025-06-18 13:50:17.403 Executing in container: lxc --project rockcraft exec local:rockcraft-ubuntu-insights-services-amd64-531901 -- env CRAFT_MANAGED_MODE=1 DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true DEBIAN_PRIORITY=critical test -f /tmp/rockcraft.log
2025-06-18 13:50:17.517 Executing on host: lxc --project rockcraft file pull local:rockcraft-ubuntu-insights-services-amd64-531901/tmp/rockcraft.log /home/runner/tmpl4m831j0.tmp-craft/tmpr1sttxbx
2025-06-18 13:50:17.592 Logs retrieved from managed instance:
2025-06-18 13:50:17.593 Executing in container: lxc --project rockcraft exec local:rockcraft-ubuntu-insights-services-amd64-531901 -- env CRAFT_MANAGED_MODE=1 DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true DEBIAN_PRIORITY=critical test -f /tmp/rockcraft-pack.yaml
2025-06-18 13:50:17.859 Could not find state file /tmp/rockcraft-pack.yaml in instance.
2025-06-18 13:50:17.859 Executing on host: lxc --project rockcraft config device show local:rockcraft-ubuntu-insights-services-amd64-531901
2025-06-18 13:50:17.928 Executing on host: lxc --project rockcraft config device remove local:rockcraft-ubuntu-insights-services-amd64-531901 disk-/root/project
2025-06-18 13:50:18.140 Executing on host: lxc --project rockcraft stop local:rockcraft-ubuntu-insights-services-amd64-531901
2025-06-18 13:50:22.016 Executing on host: lxc --project rockcraft list local: --format=yaml
2025-06-18 13:50:22.087 Executing on host: lxc --project rockcraft list local: --format=yaml
2025-06-18 13:50:22.162 Failed to run rockcraft in instance
2025-06-18 13:50:22.168 Traceback (most recent call last):
2025-06-18 13:50:22.168 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_application/services/provider.py", line 448, in run_managed
2025-06-18 13:50:22.168 instance.execute_run( # pyright: ignore[reportUnknownMemberType,reportUnknownVariableType]
2025-06-18 13:50:22.168 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_providers/lxd/lxd_instance.py", line 254, in execute_run
2025-06-18 13:50:22.168 return self.lxc.exec(
2025-06-18 13:50:22.168 ^^^^^^^^^^^^^^
2025-06-18 13:50:22.169 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_providers/lxd/lxc.py", line 390, in exec
2025-06-18 13:50:22.169 return runner(final_cmd, timeout=timeout, check=check, **kwargs)
2025-06-18 13:50:22.169 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-06-18 13:50:22.169 File "/snap/rockcraft/current/usr/lib/python3.12/subprocess.py", line 571, in run
2025-06-18 13:50:22.169 raise CalledProcessError(retcode, process.args,
2025-06-18 13:50:22.169 subprocess.CalledProcessError: Command '['lxc', '--project', 'rockcraft', 'exec', 'local:rockcraft-ubuntu-insights-services-amd64-531901', '--cwd', '/root/project', '--', 'env', 'CRAFT_MANAGED_MODE=1', 'DEBIAN_FRONTEND=noninteractive', 'DEBCONF_NONINTERACTIVE_SEEN=true', 'DEBIAN_PRIORITY=critical', 'CRAFT_PLATFORM=amd64', 'CRAFT_VERBOSITY_LEVEL=TRACE', 'rockcraft', 'pack', '--verbosity', 'trace']' returned non-zero exit status 1.
2025-06-18 13:50:22.169
2025-06-18 13:50:22.169 The above exception was the direct cause of the following exception:
2025-06-18 13:50:22.169 Traceback (most recent call last):
2025-06-18 13:50:22.169 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_application/application.py", line 615, in run
2025-06-18 13:50:22.169 return_code = self._run_inner()
2025-06-18 13:50:22.169 ^^^^^^^^^^^^^^^^^
2025-06-18 13:50:22.169 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_application/application.py", line 594, in _run_inner
2025-06-18 13:50:22.169 return_code = dispatcher.run() or os.EX_OK
2025-06-18 13:50:22.169 ^^^^^^^^^^^^^^^^
2025-06-18 13:50:22.169 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_cli/dispatcher.py", line 528, in run
2025-06-18 13:50:22.169 return self._loaded_command.run(self._parsed_command_args)
2025-06-18 13:50:22.169 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-06-18 13:50:22.169 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_application/commands/base.py", line 199, in run
2025-06-18 13:50:22.169 result = self._run(parsed_args, **kwargs) or result
2025-06-18 13:50:22.169 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-06-18 13:50:22.169 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_application/commands/lifecycle.py", line 475, in _run
2025-06-18 13:50:22.169 return super()._run(parsed_args=parsed_args, step_name=step_name)
2025-06-18 13:50:22.169 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-06-18 13:50:22.169 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_application/commands/lifecycle.py", line 181, in _run
2025-06-18 13:50:22.169 self._run_manager_for_build_plan(fetch_service_policy)
2025-06-18 13:50:22.169 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_application/commands/lifecycle.py", line 90, in _run_manager_for_build_plan
2025-06-18 13:50:22.169 provider.run_managed(build, bool(fetch_service_policy))
2025-06-18 13:50:22.169 File "/snap/rockcraft/3367/lib/python3.12/site-packages/craft_application/services/provider.py", line 455, in run_managed
2025-06-18 13:50:22.169 raise craft_providers.ProviderError(
2025-06-18 13:50:22.169 craft_providers.errors.ProviderError: Failed to run rockcraft in instance
2025-06-18 13:50:22.169 Full execution log: '/home/runner/.local/state/rockcraft/log/rockcraft-20250618-134850.295022.log'
```
Evaluation history
| Date | Model | Scores | Action | Summary |
|---|---|---|---|---|
| ~deepseek/deepseek-pro-latest |
Impact:
60
Quick Win:
36
Complexity:
25
Confidence:
85
Actionability:
80
|
needs triage | Go plugin env validation fails when `go version` triggers toolchain auto-download; stderr download message is parsed as the version. Root cause is in craft-parts validator; duplicate craft-parts#1447 is open. | |
| qwen/qwen3.6-35b-a3b |
Impact:
45
Quick Win:
20
Complexity:
40
Confidence:
75
Actionability:
75
|
keep open | Go plugin env validation fails when `go version` triggers toolchain auto-download, because the download message is captured as output instead of the version string. Issue open in craft-parts#1447. | |
| qwen/qwen3.8-27b |
Impact:
45
Quick Win:
25
Staleness:
85
Complexity:
45
Confidence:
80
Support Request:
5
|
needs triage | Go plugin environment validation fails when `go version` triggers a Go toolchain auto-download, printing 'go: downloading...' instead of a version string. Open 439 days with no labels or maintainer activity; bug still present in craft-parts go_plugin validator. | |
| qwen/qwen3.6-35b-a3b |
Staleness:
88
Complexity:
25
Confidence:
80
Support Request:
5
|
needs triage | Go plugin environment validation fails when `go version` triggers a toolchain download, causing a parsing error. Unlabelled and untouched for over a year. | |
| qwen3.6-35b-a3b-mtp-q6 |
Staleness:
95
Complexity:
30
Confidence:
85
Support Request:
5
|
needs triage | Go plugin environment validation fails when go version triggers a toolchain download, causing parsing errors. Open for 384 days with no maintainer response or labels. | |
| qwen3.6-35b-a3b-mtp-q6 |
Staleness:
90
Complexity:
25
Confidence:
85
Support Request:
5
|
needs triage | Go plugin environment validation fails when go version triggers a toolchain download, causing rockcraft to misparse the output. Untriaged, no maintainer response in over a year. |
Update history
No update history recorded yet.
Related work
-
Duplicate Of:
canonical/craft-parts#1447
(confidence 90%)
Same root cause: craft-parts go_plugin validator returns the stderr toolchain-download message instead of the stdout version output.
Related issues
| Issue | Project | State | Summary | Similarity |
|---|---|---|---|---|
| #1447 snap build fails if go must download the version | craft-parts | open | Go plugin validation misreads a toolchain-download message from stderr as the compiler version, so the first clean snapcraft pack fails while retries succeed; it remains unfixed and untriaged. |