chore: highlight swallowed errors from await blocks in DEV

packages/svelte/src/internal/client/dom/blocks/await.js

@@ -80,13 +80,9 @@ export function await_block(node, get_input, pending_fn, then_fn, catch_fn) {
 			else then_effect = branch(() => then_fn(anchor, input_source));
 		}
 
-		if (state === CATCH) {
-			if (catch_fn) {
+		if (state === CATCH && catch_fn) {
 				if (catch_effect) resume_effect(catch_effect);
 				else catch_effect = branch(() => catch_fn(anchor, error_source));
-			} else if (DEV) {
-				console.error(error_source.v);
-			}
 		}
 
 		if (state !== PENDING && pending_effect) {
@@ -135,6 +131,10 @@ export function await_block(node, get_input, pending_fn, then_fn, catch_fn) {
 					// but let's use internal_set for consistency and just to be safe
 					internal_set(error_source, error);
 					update(CATCH, true);
+					if (!catch_fn && DEV) {
+						// eslint-disable-next-line no-console
+						console.error(error_source.v);
+					}
 				}
 			);