br: fix br debug encode panic (#40880)

close #40878

br/pkg/utils/json.go

@@ -114,6 +114,10 @@ func makeJSONSchema(schema *backuppb.Schema) (*jsonSchema, error) {
 
 func fromJSONSchema(jSchema *jsonSchema) (*backuppb.Schema, error) {
  schema := jSchema.Schema
+ if schema == nil {
+ schema = &backuppb.Schema{}
+ }
+
  var err error
  schema.Db, err = json.Marshal(jSchema.DB)
  if err != nil {

br/pkg/utils/json_test.go

@@ -204,6 +204,44 @@ var testMetaJSONs = [][]byte{
  "is_raw_kv": true,
  "br_version": "BR\nRelease Version: v5.0.0-master\nGit Commit Hash: c0d60dae4998cf9ac40f02e5444731c15f0b2522\nGit Branch: HEAD\nGo Version: go1.13.4\nUTC Build Time: 2021-03-25 08:10:08\nRace Enabled: false"
 }`),
+ []byte(`{
+ "files": [
+ {
+ "sha256": "3ae857ef9b379d498ae913434f1d47c3e90a55f3a4cd9074950bfbd163d5e5fc",
+ "start_key": "7480000000000000115f720000000000000000",
+ "end_key": "7480000000000000115f72ffffffffffffffff00",
+ "name": "1_20_9_36adb8cedcd7af34708edff520499e712e2cfdcb202f5707dc9305a031d55a98_1675066275424_write.sst",
+ "end_version": 439108573623222300,
+ "crc64xor": 16261462091570213000,
+ "total_kvs": 15,
+ "total_bytes": 1679,
+ "cf": "write",
+ "size": 2514,
+ "cipher_iv": "56MTbxA4CaNILpirKnBxUw=="
+ }
+ ],
+ "schemas": [
+ {
+ "db": {
+ "charset": "utf8mb4",
+ "collate": "utf8mb4_bin",
+ "db_name": {
+ "L": "test",
+ "O": "test"
+ },
+ "id": 1,
+ "policy_ref_info": null,
+ "state": 5
+ }
+ }
+ ],
+ "ddls": [],
+ "cluster_id": 7194351714070942000,
+ "cluster_version": "\"6.1.0\"\n",
+ "br_version": "BR\nRelease Version: v6.1.0\nGit Commit Hash: 1a89decdb192cbdce6a7b0020d71128bc964d30f\nGit Branch: heads/refs/tags/v6.1.0\nGo Version: go1.18.2\nUTC Build Time: 2022-06-05 05:09:12\nRace Enabled: false",
+ "end_version": 439108573623222300,
+ "new_collations_enabled": "True"
+ }`),
 }
 
 func TestEncodeAndDecode(t *testing.T) {