`react-doctor/no-array-index-deref-without-bounds-or-empty-guard`

Array index result dereferenced without a guard

Category: Bugs
Severity: warn
Source: oxlint-plugin-react-doctor
Framework: global
Enabled when: always
Tags: test-noise
Default: Enabled

Validate the diagnostic

Confirm the reported code matches this rule before you edit it.

Confirm the reported code matches react-doctor/no-array-index-deref-without-bounds-or-empty-guard. Compare it with the Before example and verify the same API, framework, and execution context. Treat it as a false positive only when one of those conditions differs.

Compare the code

The corrected pattern shows a focused way to address the diagnostic.

Reported pattern

if (line.includes(";")) {
  const value = line.split(":")[1].trim();
}

Corrected pattern

if (line.includes(":")) {
  const value = line.split(":")[1].trim();
}

How to fix

Use the corrected pattern as a reference. Preserve behavior that the rule does not require you to change.

Copyable fix prompt

Copy this self-contained prompt into your coding agent after you confirm the diagnostic.

Fix every confirmed react-doctor/no-array-index-deref-without-bounds-or-empty-guard diagnostic in the current repository. Required change: - Guard array access with length, bounds, or match checks before dereferencing the result.

Reference transformation:Before:

if (line.includes(";")) {
  const value = line.split(":")[1].trim();
}

After:

if (line.includes(":")) {
  const value = line.split(":")[1].trim();
}

Constraints: - Confirm the reported code matches the Before pattern. - Make the smallest change that fixes the root cause. - Preserve behavior and interfaces unrelated to this diagnostic. - Reuse existing project components, utilities, and conventions. - Do not introduce render-phase side effects, render-phase state updates, or Hooks rule violations. - Adapt identifiers and framework details instead of copying blindly. - Do not disable the rule or suppress matching code. Verification: - Run focused tests for the changed behavior. - Run React Doctor and confirm this diagnostic no longer appears. - Report the files changed and any checks you could not run.

More Bugs rules from the rules reference:

react-doctor/no-async-effect-callback: Async effect callback
react-doctor/no-async-event-handler-without-reentry-guard: Async mutating handler without re-entry guard
react-doctor/no-boolean-toggle-without-functional-update: Boolean toggle reads a stale value
react-doctor/no-broken-image-source: Image has no usable source
react-doctor/no-call-component-as-function: Component called as a function

react-doctor/no-array-index-deref-without-bounds-or-empty-guard