Set default value for variable to prevent crash (RhBug:2091636)

It ensure that read of file ended successfully. https://bugzilla.redhat.com/show_bug.cgi?id=2091636
rpm-software-management · Jul 12, 2022 · f8fed33 · f8fed33
1 parent 12b5128
commit f8fed33
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/dnf/conf/substitutions.py b/dnf/conf/substitutions.py
@@ -53,6 +53,7 @@ def update_from_etc(self, installroot, varsdir=("/etc/yum/vars/", "/etc/dnf/vars
                 continue
             for fsvar in fsvars:
                 filepath = os.path.join(dir_fsvars, fsvar)
+                val = None
                 if os.path.isfile(filepath):
                     try:
                         with open(filepath) as fp:
@@ -61,4 +62,5 @@ def update_from_etc(self, installroot, varsdir=("/etc/yum/vars/", "/etc/dnf/vars
                             val = val[:-1]
                     except (OSError, IOError):
                         continue
-                self[fsvar] = val
+                if val is not None:
+                    self[fsvar] = val