sam: reject invalid ranges for cmd_extract ("x"/"y")

fixes #1152: `:2x/foo/<cr>` in a file with only one line makes vis
get stuck in an infinite loop

1 files changed, 1 insertions, 1 deletions

diff --git a/sam.c b/sam.c
index 9902a66..686fa1e 100644
--- a/sam.c
+++ b/sam.c
@@ -1497,7 +1497,7 @@ static int extract(Vis *vis, Win *win, Command *cmd, const char *argv[], Selecti
 }
 
 static bool cmd_extract(Vis *vis, Win *win, Command *cmd, const char *argv[], Selection *sel, Filerange *range) {
-	if (!win)
+	if (!win || !text_range_valid(range))
 		return false;
 	int matches = 0;
 	if (count_negative(cmd->cmd))