From: John Darrington <john@darrington.wattle.id.au>
Date: Sat, 25 Sep 2021 16:59:52 +0000 (+0200)
Subject: Fix possible incorrect assertion when creating unique casereaders.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?p=pspp;a=commitdiff_plain;h=ff47c7eb6e8335ef6042e3a437f3d30ef27600a7

Fix possible incorrect assertion when creating unique casereaders.

* src/data/casereader-translator.c (uniquify): Force dir to be an element of  {0, 1, -1}
---

diff --git a/src/data/casereader-translator.c b/src/data/casereader-translator.c
index a6508502b7..3567f5c3a5 100644
--- a/src/data/casereader-translator.c
+++ b/src/data/casereader-translator.c
@@ -502,6 +502,11 @@ uniquify (const struct ccase *c, void *aux)
 
   dir = value_compare_3way (case_data (next_case, cdr->key),
 			    current_value, key_width);
+  if (dir > 0)
+    dir = 1;
+  if (dir < 0)
+    dir = -1;
+      
   case_unref (next_case);
   if (dir != 0)
     {