From: Ben Pfaff <blp@cs.stanford.edu>
Date: Wed, 2 Jan 2019 22:42:04 +0000 (-0800)
Subject: regression: Make sure dep_subscript is really initialized.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c671071609d53f1b16f5a01718ddd2be4387ba7b;hp=c83f698c8c08b8fa2f231384757052e56bbc2dcf;p=pspp

regression: Make sure dep_subscript is really initialized.

Found by GCC 4.9.
---

diff --git a/src/language/stats/regression.c b/src/language/stats/regression.c
index ecc2279b45..264a7c1ade 100644
--- a/src/language/stats/regression.c
+++ b/src/language/stats/regression.c
@@ -561,7 +561,7 @@ fill_covariance (gsl_matrix * cov, struct covariance *all_cov,
 {
   size_t i;
   size_t j;
-  size_t dep_subscript;
+  size_t dep_subscript = SIZE_MAX;
   size_t *rows;
   const gsl_matrix *ssizes;
   const gsl_matrix *mean_matrix;
@@ -589,6 +589,8 @@ fill_covariance (gsl_matrix * cov, struct covariance *all_cov,
           dep_subscript = i;
         }
     }
+  assert (dep_subscript != SIZE_MAX);
+
   mean_matrix = covariance_moments (all_cov, MOMENT_MEAN);
   ssize_matrix = covariance_moments (all_cov, MOMENT_NONE);
   for (i = 0; i < cov->size1 - 1; i++)