trekhleb/javascript-algorithms · error · Error

Can't handle position smaller than 1 or greater than ${topMa

Error message

Can't handle position smaller than 1 or greater than ${topMaxValidPosition}

What it means

Error "Can't handle position smaller than 1 or greater than ${topMaxValidPosition}" thrown in trekhleb/javascript-algorithms.

Source

Thrown at src/algorithms/math/fibonacci/fibonacciNthClosedForm.js:13

export default function fibonacciClosedForm(position) {
  const topMaxValidPosition = 70;

  // Check that position is valid.
  if (position < 1 || position > topMaxValidPosition) {
    throw new Error(`Can't handle position smaller than 1 or greater than ${topMaxValidPosition}`);
  }

View on GitHub (pinned to 85293e3e2b)

Solutions

1. Pass a position between 1 and 70 inclusive.
2. Validate the requested position against the 1..70 range before calling fibonacciClosedForm.
3. Use an iterative or BigInt-based fibonacci implementation for positions above 70, where the closed form loses precision.

When it happens

Trigger: fibonacciClosedForm is called with a position below 1 (0 or negative) or above 70, outside the range where Binet's closed-form formula stays accurate.

Common situations: Requesting a Fibonacci number outside the safe range of Binet's formula; above 70 floating-point rounding makes the closed form inaccurate.

AI-assisted analysis of trekhleb/javascript-algorithms@85293e3e2b (2026-08-24). Data as JSON: /api/errors/3f5d6e7a4f33e8dc. Report an issue: GitHub.