Fix hang when Zero Width Space U+200B occurs at start of document.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/Editor.cxx b/src/Editor.cxx
index 07f7beb39..c1f30e124 100644
--- a/src/Editor.cxx
+++ b/src/Editor.cxx
@@ -3228,7 +3228,7 @@ void Editor::DrawBlockCaret(Surface *surface, ViewStyle &vsDraw, LineLayout *ll,
 	// glyph / combining character. If so we'll need to draw that too.
 	int offsetFirstChar = offset;
 	int offsetLastChar = offset + (posAfter - posCaret);
-	while ((offsetLastChar - numCharsToDraw) >= lineStart) {
+	while ((posBefore > 0) && ((offsetLastChar - numCharsToDraw) >= lineStart)) {
 		if ((ll->positions[offsetLastChar] - ll->positions[offsetLastChar - numCharsToDraw]) > 0) {
 			// The char does not share horizontal space
 			break;