Fix: Empty Classic Editor inside innerBlock fatal error (#17164)

* Fix: Empty Classic Editor insider innerBlock fatal error * Expand inline comment
WordPress · Aug 26, 2019 · ef82afd · ef82afd
1 parent 9b0cdf1
commit ef82afd
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/packages/blocks/src/api/parser.js b/packages/blocks/src/api/parser.js
@@ -457,6 +457,12 @@ export function createBlockWithFallback( blockNode ) {
 	// Coerce inner blocks from parsed form to canonical form.
 	innerBlocks = innerBlocks.map( createBlockWithFallback );
 
+	// Remove `undefined` innerBlocks.
+	//
+	// This is a temporary fix to prevent unrecoverable TypeErrors when handling unexpectedly
+	// empty freeform block nodes. See https://github.com/WordPress/gutenberg/pull/17164.
+	innerBlocks = innerBlocks.filter( ( innerBlock ) => innerBlock );
+
 	const isFallbackBlock = (
 		name === freeformContentFallbackBlock ||
 		name === unregisteredFallbackBlock