Bug: no-use-before-define - Can use undefined variables in a function that is passed as a parameter and then executed

Environment

ESLint Playground

What parser are you using?

@typescript-eslint/parser

What did you do?

function TestFunction <T, U> (array: T[], fn: (elem: T) => U): U[] {
    const output: U[] = [];

    for (const arr of array) {
        output.push(fn(arr));
    }
    return output;
}

const arr = [1, 2];

const a = TestFunction(
    arr,
    (T) => {
        console.log(`blah: ${a}`);
        return T;
    }
);

console.log(`blah: ${a}`);

What did you expect to happen?

An error on the usage of the variable a within the function that is passed to TestFunction as it's used before it's defined and will error at runtime.

What actually happened?

No lint error. Will error at runtime.

Link to Minimal Reproducible Example

https://eslint.org/play/#{"text":"function TestFunction <T, U> (array: T[], fn: (elem: T) => U): U[] {\n    const output: U[] = [];\n\n    for (const arr of array) {\n        output.push(fn(arr));\n    }\n    return output;\n}\n\nconst arr = [1, 2];\n\nconst a = TestFunction(\n    arr,\n    (T) => {\n        console.log(`blah: ${a}`);\n        return T;\n    }\n);\n\nconsole.log(`blah: ${a}`);\n","options":{"rules":{"accessor-pairs":["error"],"array-bracket-newline":["error"],"array-bracket-spacing":["error"],"array-callback-return":["error"],"arrow-body-style":["error"],"arrow-parens":["error"],"arrow-spacing":["error"],"block-scoped-var":["error"],"block-spacing":["error"],"brace-style":["error"],"callback-return":["error"],"camelcase":["error"],"class-methods-use-this":["error"],"comma-dangle":["error"],"comma-spacing":["error"],"comma-style":["error"],"complexity":["error"],"computed-property-spacing":["error"],"consistent-return":["error"],"consistent-this":["error"],"constructor-super":["error"],"curly":["error"],"default-case":["error"],"default-case-last":["error"],"default-param-last":["error"],"dot-location":["error"],"dot-notation":["error"],"eol-last":["error"],"eqeqeq":["error"],"for-direction":["error"],"func-call-spacing":["error"],"func-name-matching":["error"],"func-names":["error"],"function-call-argument-newline":["error"],"function-paren-newline":["error"],"generator-star-spacing":["error"],"getter-return":["error"],"global-require":["error"],"grouped-accessor-pairs":["error"],"guard-for-in":["error"],"handle-callback-err":["error"],"id-blacklist":["error"],"id-denylist":["error"],"id-match":["error"],"implicit-arrow-linebreak":["error"],"indent":["error"],"init-declarations":["error"],"jsx-quotes":["error"],"key-spacing":["error"],"keyword-spacing":["error"],"line-comment-position":["error"],"linebreak-style":["error"],"lines-around-comment":["error"],"lines-around-directive":["error"],"lines-between-class-members":["error"],"logical-assignment-operators":["error"],"max-classes-per-file":["error"],"max-depth":["error"],"max-lines":["error"],"max-lines-per-function":["error"],"max-nested-callbacks":["error"],"max-params":["error"],"max-statements":["error"],"max-statements-per-line":["error"],"multiline-comment-style":["error"],"multiline-ternary":["error"],"new-parens":["error"],"newline-after-var":["error"],"newline-per-chained-call":["error"],"no-alert":["error"],"no-array-constructor":["error"],"no-async-promise-executor":["error"],"no-await-in-loop":["error"],"no-bitwise":["error"],"no-buffer-constructor":["error"],"no-caller":["error"],"no-case-declarations":["error"],"no-catch-shadow":["error"],"no-class-assign":["error"],"no-compare-neg-zero":["error"],"no-cond-assign":["error"],"no-confusing-arrow":["error"],"no-const-assign":["error"],"no-constant-binary-expression":["error"],"no-constant-condition":["error"],"no-constructor-return":["error"],"no-continue":["error"],"no-control-regex":["error"],"no-debugger":["error"],"no-delete-var":["error"],"no-div-regex":["error"],"no-dupe-args":["error"],"no-dupe-class-members":["error"],"no-dupe-else-if":["error"],"no-dupe-keys":["error"],"no-duplicate-case":["error"],"no-duplicate-imports":["error"],"no-else-return":["error"],"no-empty":["error"],"no-empty-character-class":["error"],"no-empty-function":["error"],"no-empty-pattern":["error"],"no-empty-static-block":["error"],"no-eq-null":["error"],"no-eval":["error"],"no-ex-assign":["error"],"no-extend-native":["error"],"no-extra-bind":["error"],"no-extra-boolean-cast":["error"],"no-extra-label":["error"],"no-extra-parens":["error"],"no-extra-semi":["error"],"no-fallthrough":["error"],"no-floating-decimal":["error"],"no-func-assign":["error"],"no-global-assign":["error"],"no-implicit-coercion":["error"],"no-implicit-globals":["error"],"no-implied-eval":["error"],"no-import-assign":["error"],"no-inline-comments":["error"],"no-inner-declarations":["error"],"no-invalid-regexp":["error"],"no-invalid-this":["error"],"no-irregular-whitespace":["error"],"no-iterator":["error"],"no-label-var":["error"],"no-labels":["error"],"no-lone-blocks":["error"],"no-lonely-if":["error"],"no-loop-func":["error"],"no-loss-of-precision":["error"],"no-misleading-character-class":["error"],"no-mixed-operators":["error"],"no-mixed-requires":["error"],"no-mixed-spaces-and-tabs":["error"],"no-multi-assign":["error"],"no-multi-spaces":["error"],"no-multi-str":["error"],"no-multiple-empty-lines":["error"],"no-native-reassign":["error"],"no-negated-condition":["error"],"no-negated-in-lhs":["error"],"no-nested-ternary":["error"],"no-new":["error"],"no-new-func":["error"],"no-new-native-nonconstructor":["error"],"no-new-object":["error"],"no-new-require":["error"],"no-new-symbol":["error"],"no-new-wrappers":["error"],"no-nonoctal-decimal-escape":["error"],"no-obj-calls":["error"],"no-object-constructor":["error"],"no-octal":["error"],"no-octal-escape":["error"],"no-param-reassign":["error"],"no-path-concat":["error"],"no-plusplus":["error"],"no-process-env":["error"],"no-process-exit":["error"],"no-promise-executor-return":["error"],"no-proto":["error"],"no-prototype-builtins":["error"],"no-redeclare":["error"],"no-regex-spaces":["error"],"no-restricted-exports":["error"],"no-restricted-globals":["error"],"no-restricted-imports":["error"],"no-restricted-modules":["error"],"no-restricted-properties":["error"],"no-restricted-syntax":["error"],"no-return-assign":["error"],"no-return-await":["error"],"no-script-url":["error"],"no-self-assign":["error"],"no-self-compare":["error"],"no-sequences":["error"],"no-setter-return":["error"],"no-shadow":["error"],"no-shadow-restricted-names":["error"],"no-spaced-func":["error"],"no-sparse-arrays":["error"],"no-sync":["error"],"no-tabs":["error"],"no-template-curly-in-string":["error"],"no-ternary":["error"],"no-this-before-super":["error"],"no-throw-literal":["error"],"no-trailing-spaces":["error"],"no-unassigned-vars":["error"],"no-undef-init":["error"],"no-undefined":["error"],"no-underscore-dangle":["error"],"no-unexpected-multiline":["error"],"no-unmodified-loop-condition":["error"],"no-unneeded-ternary":["error"],"no-unreachable":["error"],"no-unreachable-loop":["error"],"no-unsafe-finally":["error"],"no-unsafe-negation":["error"],"no-unsafe-optional-chaining":["error"],"no-unused-expressions":["error"],"no-unused-labels":["error"],"no-unused-private-class-members":["error"],"no-use-before-define":["error"],"no-useless-assignment":["error"],"no-useless-backreference":["error"],"no-useless-call":["error"],"no-useless-catch":["error"],"no-useless-computed-key":["error"],"no-useless-concat":["error"],"no-useless-constructor":["error"],"no-useless-escape":["error"],"no-useless-rename":["error"],"no-useless-return":["error"],"no-var":["error"],"no-void":["error"],"no-warning-comments":["error"],"no-whitespace-before-property":["error"],"no-with":["error"],"nonblock-statement-body-position":["error"],"object-curly-newline":["error"],"object-curly-spacing":["error"],"object-property-newline":["error"],"object-shorthand":["error"],"one-var-declaration-per-line":["error"],"operator-assignment":["error"],"operator-linebreak":["error"],"padding-line-between-statements":["error"],"prefer-arrow-callback":["error"],"prefer-const":["error"],"prefer-destructuring":["error"],"prefer-exponentiation-operator":["error"],"prefer-named-capture-group":["error"],"prefer-numeric-literals":["error"],"prefer-object-has-own":["error"],"prefer-object-spread":["error"],"prefer-promise-reject-errors":["error"],"prefer-reflect":["error"],"prefer-regex-literals":["error"],"prefer-rest-params":["error"],"prefer-spread":["error"],"prefer-template":["error"],"quote-props":["error"],"quotes":["error"],"radix":["error"],"require-atomic-updates":["error"],"require-await":["error"],"require-unicode-regexp":["error"],"require-yield":["error"],"rest-spread-spacing":["error"],"semi":["error"],"semi-spacing":["error"],"semi-style":["error"],"sort-imports":["error"],"sort-keys":["error"],"sort-vars":["error"],"space-before-blocks":["error"],"space-before-function-paren":["error"],"space-in-parens":["error"],"space-infix-ops":["error"],"space-unary-ops":["error"],"strict":["error"],"switch-colon-spacing":["error"],"symbol-description":["error"],"template-curly-spacing":["error"],"template-tag-spacing":["error"],"unicode-bom":["error"],"use-isnan":["error"],"valid-typeof":["error"],"vars-on-top":["error"],"wrap-iife":["error"],"wrap-regex":["error"],"yield-star-spacing":["error"],"yoda":["error"]},"languageOptions":{"parserOptions":{"ecmaFeatures":{"jsx":true},"sourceType":"module"},"parser":"@typescript-eslint/parser"}}}

Participation

• I am willing to submit a pull request for this issue.

Additional comments

The same rule does give an error if the lines below are above the const a = ... lines.

const b = TestFunction( arr, (T) => { console.log(blah: ${a}); return T; } );