filter out empty cohorts

1 files changed, 7 insertions, 7 deletions

diff --git a/src/runtime/c/pgf/scanner.c b/src/runtime/c/pgf/scanner.c
index 71444ca25..cdbf56cc8 100644
--- a/src/runtime/c/pgf/scanner.c
+++ b/src/runtime/c/pgf/scanner.c
@@ -229,20 +229,20 @@ pgf_lookup_cohorts_helper(PgfCohortsState *state, PgfCohortSpot* spot,
 			if (min <= len-1)
 				pgf_lookup_cohorts_helper(state, spot, i, k-1, min, len-1);
 
-			if (seq->idx != NULL) {
+			if (seq->idx != NULL && gu_buf_length(seq->idx) > 0) {
 				PgfCohortRange* range = gu_buf_insert(state->found, 0);
 				range->start = *spot;
 				range->end   = current;
 				range->buf   = seq->idx;
+			}
 
-				while (*current.ptr != 0) {
-					if (!skip_space(&current.ptr, &current.pos))
-						break;
-				}
-
-				gu_buf_heap_push(state->spots, pgf_cohort_spot_order, &current);
+			while (*current.ptr != 0) {
+				if (!skip_space(&current.ptr, &current.pos))
+					break;
 			}
 
+			gu_buf_heap_push(state->spots, pgf_cohort_spot_order, &current);
+
 			if (len+1 <= max)
 				pgf_lookup_cohorts_helper(state, spot, k+1, j, len+1, max);