Function CatchClause

packages/svelte/src/compiler/phases/scope.js:1219–1232

(node, { state, next })

		},

		CatchClause(node, { state, next }) {
			if (node.param) {
				const scope = state.scope.child(true);
				scopes.set(node, scope);

				for (const id of extract_identifiers(node.param)) {
					scope.declare(id, 'normal', 'let');
				}

				next({ scope });
			} else {
				next();
			}
		},

		EachBlock(node, { state, visit }) {
			visit(node.expression);