From 08f9f6fbaf39fd852b0ede4173c276fa84bc3e8d Mon Sep 17 00:00:00 2001
From: krasimir <krasimir@chalmers.se>
Date: Tue, 16 May 2017 10:55:00 +0000
Subject: [PATCH] bugfix in the stack handling during lookup

---
 src/runtime/c/pgf/lookup.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/runtime/c/pgf/lookup.c b/src/runtime/c/pgf/lookup.c
index 8741da22c..53a70f36c 100644
--- a/src/runtime/c/pgf/lookup.c
+++ b/src/runtime/c/pgf/lookup.c
@@ -347,6 +347,10 @@ pgf_lookup_filter(GuBuf* join, PgfMetaId cat_id, GuSeq* counts, GuBuf* stack)
 	if (cat_id == 0)
 		return true;
 
+	size_t count = gu_seq_get(counts, size_t, cat_id);
+	if (count > 0)
+		return true;
+
 	size_t n_stack = gu_buf_length(stack);
 	for (size_t i = 0; i < n_stack; i++) {
 		PgfMetaId id = gu_buf_get(stack, PgfMetaId, i);
@@ -355,10 +359,6 @@ pgf_lookup_filter(GuBuf* join, PgfMetaId cat_id, GuSeq* counts, GuBuf* stack)
 		}
 	}
 	gu_buf_push(stack, PgfMetaId, cat_id);
-	
-	size_t count = gu_seq_get(counts, size_t, cat_id);
-	if (count > 0)
-		return true;
 
 	size_t pos = 0;
 	size_t maximum = 0;