ruvnet/ruflo · error

Linear coefficients length mismatch: ${problem.linear.length

Error message

Linear coefficients length mismatch: ${problem.linear.length} vs ${problem.variables}

What it means

validateQuboProblem() found that problem.linear.length differs from problem.variables. The linear coefficient vector must have exactly one entry per variable; a mismatched array means the QUBO problem definition is internally inconsistent.

Source

Thrown at v3/plugins/quantum-optimizer/src/bridges/exotic-bridge.ts:335

    return {
      solutions,
      queries,
      optimalQueries: optimalIterations,
      successProbability: successProb,
    };
  }

  // ============================================================================
  // Private Helper Methods
  // ============================================================================

  private validateQuboProblem(problem: QUBOProblem): void {
    if (problem.variables < 1 || problem.variables > 10000) {
      throw new Error(`Invalid number of variables: ${problem.variables} (must be 1-10000)`);
    }

    if (problem.linear.length !== problem.variables) {
      throw new Error(`Linear coefficients length mismatch: ${problem.linear.length} vs ${problem.variables}`);
    }

    const expectedQuadratic = (problem.variables * (problem.variables - 1)) / 2;
    if (problem.quadratic.length !== expectedQuadratic && problem.quadratic.length !== 0) {
      throw new Error(`Quadratic coefficients length mismatch: ${problem.quadratic.length} vs ${expectedQuadratic}`);
    }
  }

  private validateProblemGraph(graph: ProblemGraph): void {
    if (graph.nodes < 1 || graph.nodes > 1000) {
      throw new Error(`Invalid number of nodes: ${graph.nodes} (must be 1-1000)`);
    }

    for (const [u, v] of graph.edges) {
      if (u < 0 || u >= graph.nodes || v < 0 || v >= graph.nodes) {
        throw new Error(`Invalid edge: [${u}, ${v}] for ${graph.nodes} nodes`);
      }
    }

View on GitHub (pinned to fa13ee4ad6)

Solutions

1. Ensure both inputs have identical lengths before the operation; pad or truncate as appropriate for the domain.
2. Validate lengths at the call site and fail fast with both lengths in the message.

When it happens

Trigger: Thrown at v3/plugins/quantum-optimizer/src/bridges/exotic-bridge.ts:335 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of ruvnet/ruflo@fa13ee4ad6 (2026-08-18). Data as JSON: /api/errors/b9747e5750be0c04. Report an issue: GitHub.