Do not extend decorations when appending to end of document. Bug #3378718.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/Decoration.cxx b/src/Decoration.cxx
index 90bde57f2..24632d7c1 100644
--- a/src/Decoration.cxx
+++ b/src/Decoration.cxx
@@ -126,9 +126,13 @@ bool DecorationList::FillRange(int &position, int value, int &fillLength) {
 }
 
 void DecorationList::InsertSpace(int position, int insertLength) {
+	const bool atEnd = position == lengthDocument;
 	lengthDocument += insertLength;
 	for (Decoration *deco=root; deco; deco = deco->next) {
 		deco->rs.InsertSpace(position, insertLength);
+		if (atEnd) {
+			deco->rs.FillRange(position, 0, insertLength);
+		}
 	}
 }