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-rwxr-xr-xBugzilla/Bug.pm3
1 files changed, 2 insertions, 1 deletions
diff --git a/Bugzilla/Bug.pm b/Bugzilla/Bug.pm
index 7ffc3b52e..7a4c02e89 100755
--- a/Bugzilla/Bug.pm
+++ b/Bugzilla/Bug.pm
@@ -946,7 +946,8 @@ sub _check_deadline {
# Check time-tracking permissions.
my $tt_group = Bugzilla->params->{"timetrackinggroup"};
- my $current = ref $invocant ? $invocant->deadline : undef;
+ # deadline() returns '' instead of undef if no deadline is set.
+ my $current = ref $invocant ? ($invocant->deadline || undef) : undef;
return $current unless $tt_group && Bugzilla->user->in_group($tt_group);
# Validate entered deadline