Guard against negative lineIndex

WordPress · Jan 29, 2019 · 181411b · 181411b
1 parent c46a0cd
commit 181411b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/rich-text/src/get-parent-line-index.js b/packages/rich-text/src/get-parent-line-index.js
@@ -19,7 +19,7 @@ export function getParentLineIndex( { text, formats }, lineIndex ) {
 
 	let index = lineIndex;
 
-	while ( index-- ) {
+	while ( index-- <= 0 ) {
 		if ( text[ index ] !== LINE_SEPARATOR ) {
 			continue;
 		}