tidb panic: invalid memory address or nil pointer dereference

[vivid392845427]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

run auto testcase tipocket-bank2a on test-store

2. What did you expect to see? (Required)

testcase run success

3. What did you see instead (Required)

testcase run failed， found tidb panic：
2021/11/30 01:34:48 panic_check.go:85: [fatal] panic found:
	node[comp=tidb,ip=tipocket-bank2a-tidb-0.tipocket-bank2a-tidb-peer.tipocket-bank2a-1638230400.svc:4000,ns=tipocket-bank2a-1638230400,pod=tipocket-bank2a-tidb-0]:
		[2021/11/30 01:34:29.150 +00:00] [Error] [conn.go:1010] ["connection running loop panic"] [conn=259] [lastSQL="SELECT id, balance FROM bank2_accounts WHERE id IN (133020, 241884) FOR UPDATE"] [err="runtime error: invalid memory address or nil pointer dereference"] [stack="goroutine 4450 [running]:\ngithub.com/pingcap/tidb/server.(*clientConn).Run.func1(0x42fa5f0, 0xc002313680, 0xc002221e00)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/server/conn.go:1008 +0xf5\npanic(0x39424e0, 0x5a78460)\n\t/usr/local/go/src/runtime/panic.go:965 +0x1b9\ngithub.com/pingcap/tidb/parser.(*Digest).String(...)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/parser/digester.go:45\ngithub.com/pingcap/tidb/session.(*session).SetProcessInfo(0xc003b1c400, 0x0, 0x0, 0xc0617dc948fa68ae, 0x30e904ea51, 0x619fe40, 0xc00171a400, 0x0)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/session/session.go:1247 +0x3ea\ngithub.com/pingcap/tidb/server.(*clientConn).dispatch.func2(0xc002221e00, 0xc0617dc948fa68ae, 0x30e904ea51, 0x619fe40, 0x61d2f28, 0x43308a0, 0x61d2f28)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/server/conn.go:1269 +0x12a\npanic(0x39424e0, 0x5a78460)\n\t/usr/local/go/src/runtime/panic.go:971 +0x499\ngithub.com/pingcap/tidb/parser.(*Digest).String(...)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/parser/digester.go:45\ngithub.com/pingcap/tidb/session.(*session).SetProcessInfo(0xc003b1c400, 0xc00053f541, 0x4e, 0xc0617dc948fba22e, 0x30e90623e5, 0x619fe40, 0x1332e03, 0x0)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/session/session.go:1247 +0x3ea\ngithub.com/pingcap/tidb/session.(*session).ExecuteStmt(0xc003b1c400, 0x42fa5f0, 0xc00a893b60, 0x4319018, 0xc008b23c20, 0x0, 0x0, 0x0, 0x0)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/session/session.go:1548 +0x3f4\ngithub.com/pingcap/tidb/server.(*TiDBContext).ExecuteStmt(0xc003b36ea0, 0x42fa5f0, 0xc00a893b60, 0x4319018, 0xc008b23c20, 0xc00ab9d0e0, 0x42fa5f0, 0xc00a893b60, 0x0)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/server/driver_tidb.go:219 +0x6b\ngithub.com/pingcap/tidb/server.(*clientConn).handleStmt(0xc002221e00, 0x42fa548, 0xc00a893b60, 0x4319018, 0xc008b23c20, 0x61d2f28, 0x0, 0x0, 0x1, 0x0, ...)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/server/conn.go:1941 +0x1d1\ngithub.com/pingcap/tidb/server.(*clientConn).handleQuery(0xc002221e00, 0x42fa548, 0xc006269e00, 0xc00053f541, 0x4e, 0x0, 0x0)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/server/conn.go:1810 +0x498\ngithub.com/pingcap/tidb/server.(*clientConn).dispatch(0xc002221e00, 0x42fa548, 0xc006269e00, 0xc00053f540, 0x4f, 0x4e, 0x0, 0x0)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/server/conn.go:1315 +0xafd\ngithub.com/pingcap/tidb/server.(*clientConn).Run(0xc002221e00, 0x42fa5f0, 0xc002313680)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/server/conn.go:1070 +0x2bc\ngithub.com/pingcap/tidb/server.(*Server).onConn(0xc00030b520, 0xc002221e00)\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/server/server.go:548 +0xa93\ncreated by github.com/pingcap/tidb/server.(*Server).startNetworkListener\n\t/home/jenkins/agent/workspace/build_tidb_multi_branch_master/go/src/github.com/pingcap/tidb/server/server.go:451 +0x91c\n"]

4. What is your TiDB version? (Required)

["Welcome to TiDB."] ["Release Version"=v5.4.0-alpha-263-g443f15ed4] [Edition=Community] ["Git Commit Hash"=443f15ed4edf9b4a7fc4a79fef17828fdd3ca984] ["Git Branch"=master] ["UTC Build Time"="2021-11-29 12:29:26"] [GoVersion=go1.16.4] ["Race Enabled"=false] ["Check Table Before Drop"=false] ["TiKV Min Version"=v3.0.0-60965b006877ca7234adaced7890d7b029ed1306]

[bb7133]

It looks that it is introduced by pingcap/parser#1231, PTAL @crazycs520

[crazycs520]

@vivid392845427 Can this case be reproduced?

[vivid392845427]

@vivid392845427 Can this case be reproduced?

it is occasional，only appeared one time