diff options
Diffstat (limited to 'src/encoding/json/encode.go')
| -rw-r--r-- | src/encoding/json/encode.go | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/encoding/json/encode.go b/src/encoding/json/encode.go index 667df31ce3..98a9899502 100644 --- a/src/encoding/json/encode.go +++ b/src/encoding/json/encode.go @@ -443,7 +443,11 @@ func marshalerEncoder(e *encodeState, v reflect.Value, opts encOpts) { e.WriteString("null") return } - m := v.Interface().(Marshaler) + m, ok := v.Interface().(Marshaler) + if !ok { + e.WriteString("null") + return + } b, err := m.MarshalJSON() if err == nil { // copy JSON into buffer, checking validity. |