pkg/ccl/sqlproxyccl/conn_migration.go:49 +0x31
  github.com/cockroachdb/cockroach/pkg/ccl/sqlproxyccl.(*forwarder).TransferConnection()
      pkg/ccl/sqlproxyccl/conn_migration.go:149 +0x11b
  github.com/cockroachdb/cockroach/pkg/ccl/sqlproxyccl/balancer.(*Balancer).processQueue.func1.1()
      pkg/ccl/sqlproxyccl/balancer/balancer.go:371 +0x267
  github.com/cockroachdb/cockroach/pkg/util/stop.(*Stopper).RunAsyncTaskEx.func2()
      pkg/util/stop/stopper.go:500 +0x342
  github.com/cockroachdb/cockroach/pkg/util/stop.(*Stopper).RunAsyncTaskEx.gowrap1()
      pkg/util/stop/stopper.go:501 +0x4f

Previous write at 0x0000114b2748 by goroutine 4715:
  reflect.typedmemmove()
      GOROOT/src/runtime/mbarrier.go:225 +0x0
  reflect.Value.Set()
      GOROOT/src/reflect/value.go:2321 +0x184
  github.com/cockroachdb/cockroach/pkg/testutils.TestingHook.func1()
      pkg/testutils/hook.go:18 +0x70
  runtime.deferreturn()
      GOROOT/src/runtime/panic.go:611 +0x5d
  testing.tRunner()
      GOROOT/src/testing/testing.go:1690 +0x226
  testing.(*T).Run.gowrap1()
      GOROOT/src/testing/testing.go:1743 +0x44

Goroutine 4718 (running) created at:
  github.com/cockroachdb/cockroach/pkg/util/stop.(*Stopper).RunAsyncTaskEx()
      pkg/util/stop/stopper.go:489 +0x72f
  github.com/cockroachdb/cockroach/pkg/util/stop.(*Stopper).RunAsyncTask()
      pkg/util/stop/stopper.go:360 +0x1ef
  github.com/cockroachdb/cockroach/pkg/ccl/sqlproxyccl/balancer.(*Balancer).processQueue.func1()
      pkg/ccl/sqlproxyccl/balancer/balancer.go:363 +0xc0
  github.com/cockroachdb/cockroach/pkg/ccl/sqlproxyccl/balancer.(*Balancer).processQueue()
      pkg/ccl/sqlproxyccl/balancer/balancer.go:386 +0xa5
  github.com/cockroachdb/cockroach/pkg/ccl/sqlproxyccl/balancer.(*Balancer).processQueue-fm()
      <autogenerated>:1 +0x47
  github.com/cockroachdb/cockroach/pkg/util/stop.(*Stopper).RunAsyncTaskEx.func2()
      pkg/util/stop/stopper.go:500 +0x342
  github.com/cockroachdb/cockroach/pkg/util/stop.(*Stopper).RunAsyncTaskEx.gowrap1()
      pkg/util/stop/stopper.go:501 +0x4f

Goroutine 4715 (finished) created at:
  testing.(*T).Run()
      GOROOT/src/testing/testing.go:1743 +0x825
  github.com/cockroachdb/cockroach/pkg/ccl/sqlproxyccl.TestCancelQuery()
      pkg/ccl/sqlproxyccl/proxy_handler_test.go:1724 +0x1cde
  testing.tRunner()
      GOROOT/src/testing/testing.go:1690 +0x226
  testing.(*T).Run.gowrap1()
      GOROOT/src/testing/testing.go:1743 +0x44
==================