oxc-project/oxc · error · OxcDiagnostic

This dependency is specified more than once in the dependenc

Error message

This dependency is specified more than once in the dependency array.

What it means

Raised by react/exhaustive_deps when the same dependency appears more than once in a hook's dependency array. At the throw site the duplicate entry is redundant — React only reads it once — and it usually signals a copy/paste mistake or an oversight when editing the list. run() detects repeated identifiers within a single dependency array literal and reports the duplicated element span.

Source

Thrown at crates/oxc_linter/src/rules/react/exhaustive_deps.rs:153

fn dependency_array_not_array_literal_diagnostic(hook_name: &str, span: Span) -> OxcDiagnostic {
    OxcDiagnostic::warn(format!(
        "React Hook {hook_name} was passed a dependency list that is not an array literal. This means we can't statically verify whether you've passed the correct dependencies."
    ))
    .with_label(span)
    .with_help("Use an array literal as the second argument.")
    .with_error_code_scope(SCOPE)
}

fn literal_in_dependency_array_diagnostic(span: Span) -> OxcDiagnostic {
    OxcDiagnostic::warn("The literal is not a valid dependency because it never changes.")
        .with_label(span)
        .with_help("Remove the literal from the array.")
        .with_error_code_scope(SCOPE)
}

fn duplicate_dependency_diagnostic(span: Span) -> OxcDiagnostic {
    OxcDiagnostic::warn("This dependency is specified more than once in the dependency array.")
        .with_label(span)
        .with_help("Remove the duplicate dependency from the array.")
        .with_error_code_scope(SCOPE)
}

fn complex_expression_in_dependency_array_diagnostic(hook_name: &str, span: Span) -> OxcDiagnostic {
    OxcDiagnostic::warn(format!(
        "React Hook {hook_name} has a complex expression in the dependency array.",
    ))
    .with_label(span)
    .with_help("Extract the expression to a separate variable so it can be statically checked.")
    .with_error_code_scope(SCOPE)
}

fn dependency_changes_on_every_render_diagnostic(
    hook_name: &str,
    span: Span,
    dep_name: &str,

View on GitHub (pinned to e1e7af627c)

Solutions

1. Remove duplicate entries so each dependency appears exactly once.

When it happens

Trigger: Thrown at crates/oxc_linter/src/rules/react/exhaustive_deps.rs:153 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of oxc-project/oxc@e1e7af627c (2026-08-20). Data as JSON: /api/errors/bd7be15cf8722696. Report an issue: GitHub.