[glib: 3/4] gvariant: Fix some memory leaks on error paths

[Emmanuele Bassi <ebassi src gnome org>]

commit e487df31e196609546d72d1f9a420aeb109c8d09
Author: Philip Withnall <philip tecnocode co uk>
Date:   Tue Jul 17 12:14:36 2018 +0200

    gvariant: Fix some memory leaks on error paths
    
    Coverity CID: #1393955
    Signed-off-by: Philip Withnall <philip tecnocode co uk>

 glib/gvariant.c | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)
---
diff --git a/glib/gvariant.c b/glib/gvariant.c
index 6a9b37c9a..4dbce8c60 100644
--- a/glib/gvariant.c
+++ b/glib/gvariant.c
@@ -4738,10 +4738,13 @@ g_variant_valist_new_nnp (const gchar **str,
           type = g_variant_type_element (type);
 
           if G_UNLIKELY (!g_variant_type_is_subtype_of (type, (GVariantType *) *str))
-            g_error ("g_variant_new: expected GVariantBuilder array element "
-                     "type '%s' but the built value has element type '%s'",
-                     g_variant_type_dup_string ((GVariantType *) *str),
-                     g_variant_get_type_string (value) + 1);
+            {
+              gchar *type_string = g_variant_type_dup_string ((GVariantType *) *str);
+              g_error ("g_variant_new: expected GVariantBuilder array element "
+                       "type '%s' but the built value has element type '%s'",
+                       type_string, g_variant_get_type_string (value) + 1);
+              g_free (type_string);
+            }
 
           g_variant_type_string_scan (*str, NULL, str);
 
@@ -4803,10 +4806,13 @@ g_variant_valist_new_nnp (const gchar **str,
 
     case '@':
       if G_UNLIKELY (!g_variant_is_of_type (ptr, (GVariantType *) *str))
-        g_error ("g_variant_new: expected GVariant of type '%s' but "
-                 "received value has type '%s'",
-                 g_variant_type_dup_string ((GVariantType *) *str),
-                 g_variant_get_type_string (ptr));
+        {
+          gchar *type_string = g_variant_type_dup_string ((GVariantType *) *str);
+          g_error ("g_variant_new: expected GVariant of type '%s' but "
+                   "received value has type '%s'",
+                   type_string, g_variant_get_type_string (ptr));
+          g_free (type_string);
+        }
 
       g_variant_type_string_scan (*str, NULL, str);