Fixed Bug #2830307 crash when adding marker to line beyond end of document.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/PerLine.cxx b/src/PerLine.cxx
index f8989691d..e2e892d76 100644
--- a/src/PerLine.cxx
+++ b/src/PerLine.cxx
@@ -188,11 +188,14 @@ int LineMarkers::AddMark(int line, int markerNum, int lines) {
 		// No existing markers so allocate one element per line
 		markers.InsertValue(0, lines, 0);
 	}
+	if (line >= markers.Length()) {
+		return -1;
+	}
 	if (!markers[line]) {
 		// Need new structure to hold marker handle
 		markers[line] = new MarkerHandleSet();
 		if (!markers[line])
-			return - 1;
+			return -1;
 	}
 	markers[line]->InsertHandle(handleCurrent, markerNum);