unstable test testPrepareSerialSuite.TestPrepareCacheIndexScan #25455
Description
Bug Report
prepare_test.go:167:
...
/home/jenkins/agent/workspace/tidb-unit-test-nightly/go/src/github.com/pingcap/tidb/util/testleak/leaktest.go:168:
c.Errorf("Test %s check-count %d appears to have leaked: %v", c.TestName(), cnt, g)
... Error: Test testPrepareSerialSuite.TestPrepareCacheIndexScan check-count 50 appears to have leaked: github.com/pingcap/tidb/ddl.(*worker).start(0xc351409d50, 0xc351420f00)
/home/jenkins/agent/workspace/tidb-unit-test-nightly/go/src/github.com/pingcap/tidb/ddl/ddl_worker.go:157 +0x315
created by github.com/pingcap/tidb/ddl.(*ddl).Start
/home/jenkins/agent/workspace/tidb-unit-test-nightly/go/src/github.com/pingcap/tidb/ddl/ddl.go:364 +0x6a5
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master a45b3aa