function each_key_duplicate(a, b, value) {
	if (DEV) {
		const error = new Error(`each_key_duplicate\n${value ? `Keyed each block has duplicate key \`${value}\` at indexes ${a} and ${b}` : `Keyed each block has duplicate key at indexes ${a} and ${b}`}\nhttps://svelte.dev/e/each_key_duplicate`);

		error.name = 'Svelte error';
		throw error;
	} else {
		throw new Error(`https://svelte.dev/e/each_key_duplicate`);
	}
}
Keyed each block has duplicate key `%value%` at indexes %a% and %b%
@param {string} a
@param {string} b
@param {string | undefined | null} [value]
@returns {never}