Investigate bug root cause #2005
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PR Summary
Added a detailed bug analysis report documenting a critical panic issue in the digger CLI caused by unsafe pointer dereferencing of WorkflowRunUrl when updating GitHub PR comments.
- Added
bug_analysis_issue_2003.mdidentifying unsafe pointer dereferencing as root cause for CLI panics - Report reveals increased frequency of nil WorkflowRunUrl in terragrunt projects due to workflow URL detection differences
- Proposes implementation of nil safety checks to prevent panics during PR comment updates
1 file reviewed, 1 comment
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bug_analysis_issue_2003.md
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| - This appears to be a recent regression, likely introduced when workflow URL functionality was added/modified | ||
| - The issue affects both the enterprise (`ee/`) and open-source (`libs/`) comment updater implementations | ||
| - The fix is straightforward but needs to be applied consistently across all comment updater implementations |
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style: Consider adding debug logging across both implementations to maintain consistent observability
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✅ No security or compliance issues detected. Reviewed everything up to fcaf1ec. Security Overview
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Actionable comments posted: 0
🧹 Nitpick comments (2)
bug_analysis_issue_2003.md (2)
1-5: Clarify cross-reference between issue and PR numbersThe heading refers to “Issue #2003”, while the PR description cites PR #2005. If these are different trackers (issue vs. PR) that’s fine, but readers may get confused. Consider adding an explicit note or a direct link for each to avoid ambiguity.
9-16: Add a language identifier to the fenced code block (MD040)markdownlint flagged this snippet because the triple-back-tick fence lacks a language tag.
Addingtext(orconsole) will silence the linter and improve rendering in many viewers.-``` +```text panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x70 pc=0x23921ef] goroutine 1 [running]: github.com/diggerhq/digger/cli/pkg/digger.RunJobs /home/runner/work/_actions/diggerhq/digger/ec77f5be2d78db212e81656cf7dcf14192947043/cli/pkg/digger/digger.go:162 -``` +```
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bug_analysis_issue_2003.md(1 hunks)
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🧠 Learnings (1)
bug_analysis_issue_2003.md (1)
Learnt from: motatoes
PR: diggerhq/digger#1864
File: backend/controllers/projects.go:672-678
Timestamp: 2024-12-30T09:19:58.162Z
Learning: In file `backend/controllers/projects.go`, the user clarified that the AI summary token is considered non-critical, so they prefer not to validate it.
🪛 markdownlint-cli2 (0.17.2)
bug_analysis_issue_2003.md
9-9: Fenced code blocks should have a language specified
(MD040, fenced-code-language)
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Co-authored-by: mo <[email protected]>
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🧹 Nitpick comments (2)
ee/cli/pkg/comment_updater/updater.go (1)
41-45: Good fix for nil pointer dereference, but consider a better default value.The nil pointer check correctly prevents runtime panics. However, using
"#"as the default creates a link to the current page's top, which might be confusing to users when the workflow URL is unavailable.Consider using a more descriptive default:
- workflowUrl := "#" + workflowUrl := "javascript:void(0)" // or "" for no linkAlternatively, you could conditionally render the link only when the URL is available.
libs/comment_utils/summary/updater.go (1)
45-49: Consistent nil pointer safety implementation.The nil pointer check matches the pattern used in the other file, which is good for consistency. The same concern about the default value applies here as well.
Consider extracting this common pattern into a helper function to reduce duplication:
func SafeWorkflowUrl(workflowRunUrl *string) string { if workflowRunUrl != nil { return *workflowRunUrl } return "javascript:void(0)" // or another appropriate default }Then both files could use:
workflowUrl := SafeWorkflowUrl(job.WorkflowRunUrl)
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ee/cli/pkg/comment_updater/updater.go(1 hunks)libs/comment_utils/summary/updater.go(1 hunks)
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🔇 Additional comments (2)
ee/cli/pkg/comment_updater/updater.go (1)
48-48: Correct usage of the safely handled workflow URL.The implementation correctly uses the
workflowUrlvariable that was safely assigned above, preventing the original nil pointer dereference issue.libs/comment_utils/summary/updater.go (1)
54-54: Correct usage of the safely handled workflow URL.The implementation correctly uses the
workflowUrlvariable, maintaining consistency with the fix in the other comment updater.
fixes #2003, while I'm not sure how the job.workflowRunUrl ended up being nil (I think we always set it to '#' by default, but this type of error checking on the job is also needed)
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