range-set: satisfy non-empty ranges invariant

diff --git a/line-log.c b/line-log.c
index 52348796c1b482c06f8944999603a5b92dcfdf04..6f94d56063aa6d9544be4fdb41241a968f5aa347 100644 (file)
--- a/line-log.c
+++ b/line-log.c
@@ -115,6 +115,8 @@ static void sort_and_merge_range_set(struct range_set *rs)
        qsort(rs->ranges, rs->nr, sizeof(struct range), range_cmp);
 
        for (i = 0; i < rs->nr; i++) {
+               if (rs->ranges[i].start == rs->ranges[i].end)
+                       continue;
                if (o > 0 && rs->ranges[i].start <= rs->ranges[o-1].end) {
                        if (rs->ranges[o-1].end < rs->ranges[i].end)
                                rs->ranges[o-1].end = rs->ranges[i].end;