Update main.py #14
Update main.py #14
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Note Other AI code review bot(s) detectedCodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review. WalkthroughModified the base-case return statement in Changes
Estimated code review effort🎯 1 (Trivial) | ⏱️ ~3 minutes
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Pre-merge checks and finishing touches❌ Failed checks (1 warning, 1 inconclusive)
✅ Passed checks (1 passed)
✨ Finishing touches
🧪 Generate unit tests (beta)
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Summary of ChangesHello @visz11, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request modifies the Highlights
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Code Review
This pull request introduces a critical bug in the nth_fibonacci_util function. The change replaces a correct return value with an undefined variable m, which will cause a NameError when the function is called. This needs to be reverted to the original, correct implementation.
| # Base case: if n is 0 or 1, return n | ||
| if n <= 1: | ||
| return n | ||
| return m |
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This line introduces a NameError because the variable m is not defined within the function's scope. The base case for the Fibonacci sequence is that for n <= 1, the function should return n. The original code was correct.
| return m | |
| return n |
Refacto PR SummaryFixed critical bug in Fibonacci calculation function where base case incorrectly returns undefined variable 'm' instead of parameter 'n'. This bug would cause runtime errors for Fibonacci sequence calculations when n ≤ 1, breaking the memoized recursive implementation. Key Changes:
Change HighlightsClick to expand
Sequence DiagramsequenceDiagram
participant C as Caller
participant F as nth_fibonacci_util
participant M as Memo Table
C->>F: nth_fibonacci_util(n, memo)
F->>F: Check if n <= 1
alt n <= 1 (base case)
F-->>C: return n
else n > 1
F->>M: Check memo[n]
alt memo exists
M-->>F: cached result
F-->>C: return cached value
else calculate
F->>F: recursive calls
F->>M: store result
F-->>C: return calculated value
end
end
Testing GuideClick to expand
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| # Base case: if n is 0 or 1, return n | ||
| if n <= 1: | ||
| return n | ||
| return m |
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Suggestion: In the memoized Fibonacci utility, the base case returns an undefined variable, which will raise a NameError at runtime the first time the base case is hit, and also fails to return the correct Fibonacci value for 0 or 1. [possible bug]
Severity Level: Critical 🚨
| return m | |
| return n |
Why it matters? ⭐
The PR's current file state shows nth_fibonacci_util has the base-case "return m" (line 21 in the new hunk). "m" is not defined anywhere in that scope — calling nth_fibonacci_util(0, memo) or nth_fibonacci_util(1, memo) will raise a NameError and also return the wrong value. Replacing it with "return n" fixes the runtime bug and returns the correct Fibonacci value for 0 and 1. This is a real bug, not a cosmetic change.
Prompt for AI Agent 🤖
This is a comment left during a code review.
**Path:** main.py
**Line:** 21:21
**Comment:**
*Possible Bug: In the memoized Fibonacci utility, the base case returns an undefined variable, which will raise a NameError at runtime the first time the base case is hit, and also fails to return the correct Fibonacci value for 0 or 1.
Validate the correctness of the flagged issue. If correct, How can I resolve this? If you propose a fix, implement it and please make it concise.
Nitpicks 🔍
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| # Base case: if n is 0 or 1, return n | ||
| if n <= 1: | ||
| return n | ||
| return m |
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Critical: Undefined variable causes NameError.
The return statement references an undefined variable m, which will cause a NameError at runtime when the base case is reached (n ≤ 1). This completely breaks the memoized Fibonacci implementation.
Apply this diff to fix the issue:
- return m
+ return n📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| return m | |
| return n |
🧰 Tools
🪛 Ruff (0.14.8)
21-21: Undefined name m
(F821)
🤖 Prompt for AI Agents
In main.py around line 21, the base-case return uses an undefined variable `m`
causing a NameError; replace `return m` with `return n` so the function returns
the correct Fibonacci value for n ≤ 1 and preserves the memoized implementation.
CodeAnt-AI Description
Base case return changed to undefined variable causing errors for n ≤ 1
What Changed
Impact
✅ Crashes for n ≤ 1 when computing Fibonacci✅ Incorrect Fibonacci results for small inputs✅ Runtime NameError when invoking the function with 0 or 1💡 Usage Guide
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