Fix #643

src/generators/dom/visitors/IfBlock.ts

@@ -271,9 +271,14 @@ function compound(
 		`);
 	}
 
-	block.builders.destroy.addLine(
+	block.builders.unmount.addLine(
 		`${if_name}{
 			${name}.unmount();
+		}`
+	);
+
+	block.builders.destroy.addLine(
+		`${if_name}{
 			${name}.destroy();
 		}`
 	);

test/js/samples/if-block-no-update/expected-bundle.js

@@ -164,12 +164,14 @@ function create_main_fragment ( state, component ) {
 		},
 
 		unmount: function () {
+			{
+						if_block.unmount();
+					}
 			detachNode( if_block_anchor );
 		},
 
 		destroy: function () {
 			{
-						if_block.unmount();
 						if_block.destroy();
 					}
 		}

test/js/samples/if-block-no-update/expected.js

@@ -29,12 +29,14 @@ function create_main_fragment ( state, component ) {
 		},
 
 		unmount: function () {
+			{
+						if_block.unmount();
+					}
 			detachNode( if_block_anchor );
 		},
 
 		destroy: function () {
 			{
-						if_block.unmount();
 						if_block.destroy();
 					}
 		}