From 31b3dfcee13fe1342705ad18fc347104c337ea88 Mon Sep 17 00:00:00 2001
From: Danny Smith <danny@gorcha.org>
Date: Tue, 10 Jan 2023 23:22:54 +1100
Subject: [PATCH] Fix SAS catalog parsing failure when formats have no labels

---
 src/sas/readstat_sas7bcat_read.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/sas/readstat_sas7bcat_read.c b/src/sas/readstat_sas7bcat_read.c
index 968d968b..77c90d1f 100644
--- a/src/sas/readstat_sas7bcat_read.c
+++ b/src/sas/readstat_sas7bcat_read.c
@@ -182,6 +182,9 @@ static readstat_error_t sas7bcat_parse_block(const char *data, size_t data_size,
     if (data_size < payload_offset + pad)
         goto cleanup;
 
+    if (label_count_used == 0)
+        goto cleanup;
+
     if ((retval = sas7bcat_parse_value_labels(&data[payload_offset+pad], data_size - payload_offset - pad,
                     label_count_used, label_count_capacity, name, ctx)) != READSTAT_OK)
         goto cleanup;