function legacy_recursive_reactive_block(filename) {
	if (DEV) {
		console.warn(`%c[svelte] legacy_recursive_reactive_block\n%cDetected a migrated \`$:\` reactive block in \`${filename}\` that both accesses and updates the same reactive value. This may cause recursive updates when converted to an \`$effect\`.\nhttps://svelte.dev/e/legacy_recursive_reactive_block`, bold, normal);
	} else {
		console.warn(`https://svelte.dev/e/legacy_recursive_reactive_block`);
	}
}
Detected a migrated `$:` reactive block in `%filename%` that both accesses and updates the same reactive value. This may cause recursive updates when converted to an `$effect`.
@param {string} filename