[pango/matthiasc/for-master] tests: Avoid a possible invalid access

[Matthias Clasen <matthiasc src gnome org>]

commit e8ff5bf30d3618be65520ee0f14beed71486157c
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Jul 10 17:14:39 2021 -0400

    tests: Avoid a possible invalid access
    
    The return value of setlocale is only good until
    the next call.

 tests/meson.build   | 1 +
 tests/test-layout.c | 7 ++++---
 2 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/tests/meson.build b/tests/meson.build
index baf5ad6b..841a78eb 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -16,6 +16,7 @@ test_env = environment()
 test_env.set('srcdir', meson.current_source_dir())
 test_env.set('G_TEST_SRCDIR', meson.current_source_dir())
 test_env.set('G_TEST_BUILDDIR', meson.current_build_dir())
+test_env.set('LC_ALL', 'en_US.UTF-8')
 
 tests = [
   [ 'test-bidi' ],
diff --git a/tests/test-layout.c b/tests/test-layout.c
index ca9e5da5..78e98b76 100644
--- a/tests/test-layout.c
+++ b/tests/test-layout.c
@@ -703,7 +703,7 @@ test_layout (gconstpointer d)
   GString *dump;
   gchar *diff;
 
-  const char *old_locale = setlocale (LC_ALL, NULL);
+  char *old_locale = g_strdup (setlocale (LC_ALL, NULL));
   setlocale (LC_ALL, "en_US.utf8");
   if (strstr (setlocale (LC_ALL, NULL), "en_US") == NULL)
     {
@@ -726,6 +726,7 @@ test_layout (gconstpointer d)
   g_assert_no_error (error);
 
   setlocale (LC_ALL, old_locale);
+  g_free (old_locale);
 
   if (diff && diff[0])
     {
@@ -755,6 +756,8 @@ main (int argc, char *argv[])
   const gchar *name;
   gchar *path;
 
+  setlocale (LC_ALL, "");
+
   if (g_getenv ("PANGO_TEST_SHOW_FONT"))
     opt_show_font = TRUE;
 
@@ -763,8 +766,6 @@ main (int argc, char *argv[])
     {
       GString *string;
 
-      setlocale (LC_ALL, "en_US.utf8");
-
       string = g_string_sized_new (0);
       test_file (argv[1], string);
       g_print ("%s", string->str);