flaky TestMultipleDealsConcurrent

[dirkmc]

=== RUN   TestMultipleDealsConcurrent
2022/06/10 08:04:27 OK    20220419132443_addcheckpointattodeals.sql
2022/06/10 08:04:27 OK    20220420124936_setcheckpointattounix0.go
2022/06/10 08:04:27 OK    20220511150555_deals-add-retry.sql
2022/06/10 08:04:27 OK    20220512094027_deals-set-retry.go
2022/06/10 08:04:27 OK    20220518162704_deals_addr_binary_to_string.go
2022/06/10 08:04:27 OK    20220520121441_deals_peerid_binary_to_string.go
2022/06/10 08:04:27 OK    20220531094921_proposal_logs.sql
2022/06/10 08:04:27 goose: no migrations to run. current version: 20220531094921
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x1461759]

goroutine 15664 [running]:
github.com/filecoin-project/boost/storagemarket.(*dealHandler).subscribeUpdates(0x0)
	/home/circleci/project/storagemarket/deal_handler.go:122 +0xb9
github.com/filecoin-project/boost/storagemarket.(*testDeal).executeAndSubscribe(0xc002cdd0e0)
	/home/circleci/project/storagemarket/provider_test.go:1793 +0x7c
github.com/filecoin-project/boost/storagemarket.(*ProviderHarness).executeNDealsConcurrentAndWaitFor.func1()
	/home/circleci/project/storagemarket/provider_test.go:951 +0x34
golang.org/x/sync/errgroup.(*Group).Go.func1()
	/go/pkg/mod/golang.org/x/sync@v0.0.0-20210220032951-036812b2e83c/errgroup/errgroup.go:57 +0x67
created by golang.org/x/sync/errgroup.(*Group).Go
	/go/pkg/mod/golang.org/x/sync@v0.0.0-20210220032951-036812b2e83c/errgroup/errgroup.go:54 +0x92
FAIL	github.com/filecoin-project/boost/storagemarket	12.912s