Don't know what's the root cause of this problem, I guess it's the parser

What code were you trying to parse?

function x<R extends Record<string, (this: any) => any>>(fns: R) {
    return fns
}

when eslint config includes

"comma-spacing": "warn",
"space-before-function-paren": ["warn", "never"],

What did you expect to happen?
code shall pass lint

What actually happened?
code violates rule comma-spacing when

function x<R extends Record<string,(this: any) => any>>(fns: R) {
    return fns
}

and violates space-before-function-paren when

function x<R extends Record<string, (this: any) => any>>(fns: R) {
    return fns
}

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