sort: fix sort -s -u, closes 14871

function                                             old     new   delta
sort_main                                            851     856      +5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/coreutils/sort.c b/coreutils/sort.c
index 80b578fc2..01b7c44e5 100644
--- a/coreutils/sort.c
+++ b/coreutils/sort.c
@@ -652,11 +652,12 @@ int sort_main(int argc UNUSED_PARAM, char **argv)
 	/* Handle -u */
 	if (option_mask32 & FLAG_u) {
 		int j = 0;
-		/* coreutils 6.3 drop lines for which only key is the same
-		 * -- disabling last-resort compare, or else compare_keys()
-		 * will be the same only for completely identical lines.
+		/* coreutils 6.3 drop lines for which only key is the same:
+		 * - disabling last-resort compare, or else compare_keys()
+		 * will be the same only for completely identical lines
+		 * - disabling -s (same reasons)
 		 */
-		option_mask32 |= FLAG_no_tie_break;
+		option_mask32 = (option_mask32 | FLAG_no_tie_break) & (~FLAG_s);
 		for (i = 1; i < linecount; i++) {
 			if (compare_keys(&lines[j], &lines[i]) == 0)
 				free(lines[i]);