Repository: sveltejs/svelte
File: packages/svelte/src/internal/client/runtime.js (JavaScript)

Code before:
		var is_disconnected = (flags ^= DISCONNECTED);

		if (dependencies !== null) {
			var is_unowned = (flags & UNOWNED) !== 0;

			for (var i = 0; i < dependencies.length; i++) {
				var dependency = dependencies[i];

				if (check_dirtiness(/** @type {import('#client').Derived} */ (dependency))) {
					update_derived(/** @type {import('#client').Derived} */ (dependency));
				}

				if (dependency.version > reaction.version) {
					return true;
				}

				if (is_unowned) {
					// TODO is there a more logical place to do this work?
					if (!current_skip_reaction && !dependency?.reactions?.includes(reaction)) {
						// If we are working with an unowned signal as part of an effect (due to !current_skip_reaction)
						// and the version hasn't changed, we still need to check that this reaction
						// if linked to the dependency source – otherwise future updates will not be caught.
						(dependency.reactions ??= []).push(reaction);
					}
				} else if (is_disconnected) {
					reconnect_derived(reaction);
				}
			}
		}

		if (is_disconnected) {
			reaction.f ^= DISCONNECTED;
		}

		set_signal_status(reaction, CLEAN);
	}

	return false;
}

/**
 * @param {Error} error
 * @param {import("#client").Effect} effect
 * @param {import("#client").ComponentContext | null} component_context
 */
function handle_error(error, effect, component_context) {
	// Given we don't yet have error boundaries, we will just always throw.
	if (!DEV || handled_errors.has(error) || component_context === null) {
		throw error;
	}


Review comment (suggestion):
```suggestion
					reconnect_derived(/** @type {import('#client').Derived} */ (reaction));
```

Code after:

		if (dependencies !== null) {
			var is_unowned = (flags & UNOWNED) !== 0;
			var i;

			if ((flags & DISCONNECTED) !== 0) {
				for (i = 0; i < dependencies.length; i++) {
					(dependencies[i].reactions ??= []).push(reaction);
				}

				reaction.f ^= DISCONNECTED;
			}

			for (i = 0; i < dependencies.length; i++) {
				var dependency = dependencies[i];

				if (check_dirtiness(/** @type {import('#client').Derived} */ (dependency))) {
					update_derived(/** @type {import('#client').Derived} */ (dependency));
				}

				if (dependency.version > reaction.version) {
					return true;
				}

				if (is_unowned) {
					// TODO is there a more logical place to do this work?
					if (!current_skip_reaction && !dependency?.reactions?.includes(reaction)) {
						// If we are working with an unowned signal as part of an effect (due to !current_skip_reaction)
						// and the version hasn't changed, we still need to check that this reaction
						// if linked to the dependency source – otherwise future updates will not be caught.
						(dependency.reactions ??= []).push(reaction);
					}
				}
			}
		}

		set_signal_status(reaction, CLEAN);
	}

	return false;
}

/**
 * @param {Error} error
 * @param {import("#client").Effect} effect
 * @param {import("#client").ComponentContext | null} component_context
 */
function handle_error(error, effect, component_context) {
	// Given we don't yet have error boundaries, we will just always throw.
	if (!DEV || handled_errors.has(error) || component_context === null) {
		throw error;