`prefer-immutable-types` crashes on Next.js `GetStaticPropsContext` type

### Why the issue was filed? Running ESLint with eslint-plugin-functional's rule `functional/prefer-immutable-types` on a Next.js page crashes ESLint with "ErrorType encountered." when the rule analyzes a parameter typed with Next's `GetStaticPropsContext<T>`. This occurs only in type-aware mode (parserOptions.project set); locally without type-aware linting on pages it does not crash, but in CI it does. ### Expected behavior The rule should not crash when encountering TypeScript's internal `ErrorType` during type analysis. It should safely treat unknown/unresolvable types as "Unknown" or skip and either report no violation or a normal diagnostic, without throwing. ### Actual behavior ESLint process exits with an error when linting the file: ```text ESLint: 8.56.0 Error: ErrorType encountered. Occurred while linting /home/runner/_work/agora/agora/src/pages/dummyPage.tsx:8 Rule: "functional/prefer-immutable-types" at getTypeData (/home/runner/_work/agora/agora/node_modules/is-immutable-type/dist/index.cjs:118:15) at Object.getTypeImmutability (/home/runner/_work/agora/agora/node_modules/is-immutable-type/dist/index.cjs:378:22) at getTypeImmutabilityOfNode (/home/runner/_work/agora/agora/node_modules/eslint-plugin-functional/lib/classic.cjs:850:28) at /home/runner/_work/agora/agora/node_modules/eslint-plugin-functional/lib/classic.cjs:2774:30 at Array.map (<anonymous>) at getParameterTypeViolations (/home/runner/_work/agora/agora/node_modules/eslint-plugin-functional/lib/classic.cjs:2739:10) at checkFunction$1 (/home/runner/_work/agora/agora/node_modules/eslint-plugin-functional/lib/classic.cjs:2891:12) ``` The crash occurs when the rule analyzes a function parameter typed with `GetStaticPropsContext<PageParams>`. ### Steps to reproduce **Environment:** - Node: 22 - TypeScript: 5.7.2 - ESLint: 8.56.0 - @typescript-eslint/parser: 5.62.0 - eslint-plugin-functional: 6.6.0 - next: 12.3.4 **ESLint config (from .eslintrc.js):** ```javascript { settings: { parser: '@typescript-eslint/parser', parserOptions: { project: './tsconfig.json', }, }, rules: { 'functional/prefer-immutable-types': [ 'error', { enforcement: 'ReadonlyShallow', ignoreInferredTypes: true, variables: { enforcement: 'None', }, fixer: { ReadonlyShallow: [ { pattern: '^([_$a-zA-Z\\xA0-\\uFFFF][_$a-zA-Z0-9\\xA0-\\uFFFF]*\\[\\])$', replace: 'readonly $1', }, { pattern: '^(Array|Map|Set)<(.+)>$', replace: 'Readonly$1<$2>', }, { pattern: '^(.+)$', replace: 'Readonly<$1>', }, ], }, }, ], }, } ``` Note: wrapping the type with `Readonly<>` has no effect on the crash. **Minimal reproduction file:** ```typescript import type { GetStaticPropsContext } from 'next'; type PageParams = { gameId: string; tournamentId: string; }; export async function getStaticProps( props: GetStaticPropsContext<PageParams> ) { const { gameId, tournamentId } = props.params!; return { props: {} as const }; } ``` **Run:** ```bash npx eslint --max-warnings=0 src/pages/dummyPage.tsx ```