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author | Imcom Jin <jinyu.bjut@gmail.com> | 2018-10-23 23:28:30 +0800 |
---|---|---|
committer | Imcom Jin <jinyu.bjut@gmail.com> | 2018-10-23 23:28:30 +0800 |
commit | 23ae91cfc1a541b7033126c284e9a2e5814836ca (patch) | |
tree | 0a3340bd55c78c34b0449443ca1d80ddc7f0cf7c /internal/pkg/table | |
parent | 8fc094cf6d8c531a559418b49f46d49998f56d09 (diff) |
fix: nil pointer in PrefixSet Append
Diffstat (limited to 'internal/pkg/table')
-rw-r--r-- | internal/pkg/table/policy.go | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/internal/pkg/table/policy.go b/internal/pkg/table/policy.go index 44feebd6..6e97723c 100644 --- a/internal/pkg/table/policy.go +++ b/internal/pkg/table/policy.go @@ -370,6 +370,12 @@ func (lhs *PrefixSet) Append(arg DefinedSet) error { if !ok { return fmt.Errorf("type cast failed") } + + if rhs.tree.Len() == 0 { + // if try to append an empty set, then return directly + return nil + } + // if either is empty, family can be ignored. if lhs.tree.Len() != 0 && rhs.tree.Len() != 0 { _, w, _ := lhs.tree.Minimum() |