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Published 20 hours ago • verified publisher icon libp2p

libp2p.Host leaks goroutines

Open piersy opened this issue 1 year ago • 7 comments

Creating a new host and closing it leaks goroutines.

The following simple test produces the following errors when run: (goleak is a library that detects leaked goroutines VerifyNone fails the test if more goroutines exist at the end of the test than at the beginning)

package shutdown

import (
	"testing"

	"github.com/libp2p/go-libp2p"
	"github.com/stretchr/testify/require"
	"go.uber.org/goleak"
)

func TestShutdown(t *testing.T) {
	defer goleak.VerifyNone(t)
	h1, err := libp2p.New()
	require.NoError(t, err)
	defer h1.Close()
}

--- FAIL: TestShutdown (0.46s)
    leaks.go:78: found unexpected goroutines:
        [Goroutine 8 in state IO wait, with internal/poll.runtime_pollWait on top of the stack:
        goroutine 8 [IO wait]:
        internal/poll.runtime_pollWait(0x7f2328390a78, 0x72)
        	/home/pierspowlesland/sdk/go1.20/src/runtime/netpoll.go:306 +0x89
        internal/poll.(*pollDesc).wait(0xc000347c00?, 0xc?, 0x0)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_poll_runtime.go:84 +0x32
        internal/poll.(*pollDesc).waitRead(...)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_poll_runtime.go:89
        internal/poll.(*FD).RawRead(0xc000347c00, 0xc000392040)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_unix.go:766 +0x145
        net.(*rawConn).Read(0xc000205a20, 0x1c6c600?)
        	/home/pierspowlesland/sdk/go1.20/src/net/rawconn.go:43 +0x45
        golang.org/x/net/internal/socket.(*syscaller).recvmmsg(0xc0003a40d8, {0x1337e80?, 0xc000205a20?}, {0xc0003a6200?, 0x11fdb70?, 0x0?}, 0x40f6de?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/mmsghdr_unix.go:121 +0x94
        golang.org/x/net/internal/socket.(*Conn).recvMsgs(0xc000423be0, {0xc00047cdc0?, 0x8, 0x8}, 0x4?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/rawconn_mmsg.go:25 +0x185
        golang.org/x/net/internal/socket.(*Conn).RecvMsgs(...)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/socket.go:267
        golang.org/x/net/ipv4.(*payloadHandler).ReadBatch(0xc000409a00, {0xc00047cdc0?, 0x5ac?, 0x5ac?}, 0xc00039cdc8?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/ipv4/batch.go:80 +0x57
        github.com/quic-go/quic-go.(*oobConn).ReadPacket(0xc0004fa000)
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/sys_conn_oob.go:164 +0x5ba
        github.com/quic-go/quic-go.(*Transport).listen(0xc0001da360, {0x7f23282249c8, 0xc0004fa000})
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:299 +0x174
        created by github.com/quic-go/quic-go.(*Transport).init.func1
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:211 +0x415
        
         Goroutine 63 in state select, with github.com/libp2p/go-libp2p/p2p/transport/quicreuse.(*reuse).gc on top of the stack:
        goroutine 63 [select]:
        github.com/libp2p/go-libp2p/p2p/transport/quicreuse.(*reuse).gc(0xc000408b40)
        	/home/pierspowlesland/projects/go-libp2p/p2p/transport/quicreuse/reuse.go:166 +0x11e
        created by github.com/libp2p/go-libp2p/p2p/transport/quicreuse.newReuse
        	/home/pierspowlesland/projects/go-libp2p/p2p/transport/quicreuse/reuse.go:141 +0x170
        
         Goroutine 64 in state select, with github.com/libp2p/go-libp2p/p2p/transport/quicreuse.(*reuse).gc on top of the stack:
        goroutine 64 [select]:
        github.com/libp2p/go-libp2p/p2p/transport/quicreuse.(*reuse).gc(0xc000408b90)
        	/home/pierspowlesland/projects/go-libp2p/p2p/transport/quicreuse/reuse.go:166 +0x11e
        created by github.com/libp2p/go-libp2p/p2p/transport/quicreuse.newReuse
        	/home/pierspowlesland/projects/go-libp2p/p2p/transport/quicreuse/reuse.go:141 +0x170
        
         Goroutine 69 in state IO wait, with internal/poll.runtime_pollWait on top of the stack:
        goroutine 69 [IO wait]:
        internal/poll.runtime_pollWait(0x7f2328390e38, 0x72)
        	/home/pierspowlesland/sdk/go1.20/src/runtime/netpoll.go:306 +0x89
        internal/poll.(*pollDesc).wait(0xc000347700?, 0xc00039aa01?, 0x0)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_poll_runtime.go:84 +0x32
        internal/poll.(*pollDesc).waitRead(...)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_poll_runtime.go:89
        internal/poll.(*FD).RawRead(0xc000347700, 0xc000392010)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_unix.go:766 +0x145
        net.(*rawConn).Read(0xc000205960, 0x7f23281f29d8?)
        	/home/pierspowlesland/sdk/go1.20/src/net/rawconn.go:43 +0x45
        golang.org/x/net/internal/socket.(*syscaller).recvmmsg(0xc0003a4048, {0x1337e80?, 0xc000205960?}, {0xc0003a6000?, 0x11fdb70?, 0x0?}, 0x40f6de?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/mmsghdr_unix.go:121 +0x94
        golang.org/x/net/internal/socket.(*Conn).recvMsgs(0xc000423360, {0xc00047c000?, 0x8, 0x8}, 0xe9e840?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/rawconn_mmsg.go:25 +0x185
        golang.org/x/net/internal/socket.(*Conn).RecvMsgs(...)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/socket.go:267
        golang.org/x/net/ipv4.(*payloadHandler).ReadBatch(0xc000409230, {0xc00047c000?, 0x0?, 0x3?}, 0x0?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/ipv4/batch.go:80 +0x57
        github.com/quic-go/quic-go.(*oobConn).ReadPacket(0xc000227c20)
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/sys_conn_oob.go:164 +0x5ba
        github.com/quic-go/quic-go.(*Transport).listen(0xc00035a360, {0x7f23282249c8, 0xc000227c20})
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:299 +0x174
        created by github.com/quic-go/quic-go.(*Transport).init.func1
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:211 +0x415
        
         Goroutine 70 in state select, with github.com/quic-go/quic-go.(*Transport).runSendQueue on top of the stack:
        goroutine 70 [select]:
        github.com/quic-go/quic-go.(*Transport).runSendQueue(0xc00035a360)
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:228 +0x113
        created by github.com/quic-go/quic-go.(*Transport).init.func1
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:212 +0x456
        
         Goroutine 77 in state IO wait, with internal/poll.runtime_pollWait on top of the stack:
        goroutine 77 [IO wait]:
        internal/poll.runtime_pollWait(0x7f2328390d48, 0x72)
        	/home/pierspowlesland/sdk/go1.20/src/runtime/netpoll.go:306 +0x89
        internal/poll.(*pollDesc).wait(0xc000347980?, 0xc00038ba01?, 0x0)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_poll_runtime.go:84 +0x32
        internal/poll.(*pollDesc).waitRead(...)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_poll_runtime.go:89
        internal/poll.(*FD).RawRead(0xc000347980, 0xc000120010)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_unix.go:766 +0x145
        net.(*rawConn).Read(0xc0002059a0, 0x7f2328bce548?)
        	/home/pierspowlesland/sdk/go1.20/src/net/rawconn.go:43 +0x45
        golang.org/x/net/internal/socket.(*syscaller).recvmmsg(0xc00012c048, {0x1337e80?, 0xc0002059a0?}, {0xc00012e000?, 0x11fdb70?, 0x0?}, 0x40f6de?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/mmsghdr_unix.go:121 +0x94
        golang.org/x/net/internal/socket.(*Conn).recvMsgs(0xc0004239e0, {0xc00047c840?, 0x8, 0x8}, 0xe9e840?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/rawconn_mmsg.go:25 +0x185
        golang.org/x/net/internal/socket.(*Conn).RecvMsgs(...)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/socket.go:267
        golang.org/x/net/ipv4.(*payloadHandler).ReadBatch(0xc000409500, {0xc00047c840?, 0x0?, 0x1?}, 0x0?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/ipv4/batch.go:80 +0x57
        github.com/quic-go/quic-go.(*oobConn).ReadPacket(0xc000227dd0)
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/sys_conn_oob.go:164 +0x5ba
        github.com/quic-go/quic-go.(*Transport).listen(0xc00035a7e0, {0x7f23282249c8, 0xc000227dd0})
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:299 +0x174
        created by github.com/quic-go/quic-go.(*Transport).init.func1
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:211 +0x415
        
         Goroutine 78 in state select, with github.com/quic-go/quic-go.(*Transport).runSendQueue on top of the stack:
        goroutine 78 [select]:
        github.com/quic-go/quic-go.(*Transport).runSendQueue(0xc00035a7e0)
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:228 +0x113
        created by github.com/quic-go/quic-go.(*Transport).init.func1
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:212 +0x456
        
         Goroutine 86 in state IO wait, with internal/poll.runtime_pollWait on top of the stack:
        goroutine 86 [IO wait]:
        internal/poll.runtime_pollWait(0x7f2328390b68, 0x72)
        	/home/pierspowlesland/sdk/go1.20/src/runtime/netpoll.go:306 +0x89
        internal/poll.(*pollDesc).wait(0xc000347a80?, 0xc000505a01?, 0x0)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_poll_runtime.go:84 +0x32
        internal/poll.(*pollDesc).waitRead(...)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_poll_runtime.go:89
        internal/poll.(*FD).RawRead(0xc000347a80, 0xc00007cb10)
        	/home/pierspowlesland/sdk/go1.20/src/internal/poll/fd_unix.go:766 +0x145
        net.(*rawConn).Read(0xc0002059e0, 0x0?)
        	/home/pierspowlesland/sdk/go1.20/src/net/rawconn.go:43 +0x45
        golang.org/x/net/internal/socket.(*syscaller).recvmmsg(0xc0000f2438, {0x1337e80?, 0xc0002059e0?}, {0xc000600000?, 0x11fdb70?, 0x0?}, 0x7f23283afe58?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/mmsghdr_unix.go:121 +0x94
        golang.org/x/net/internal/socket.(*Conn).recvMsgs(0xc000423ae0, {0xc00047cb00?, 0x8, 0x8}, 0xe9e840?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/rawconn_mmsg.go:25 +0x185
        golang.org/x/net/internal/socket.(*Conn).RecvMsgs(...)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/internal/socket/socket.go:267
        golang.org/x/net/ipv4.(*payloadHandler).ReadBatch(0xc000409820, {0xc00047cb00?, 0x0?, 0x0?}, 0x0?)
        	/home/pierspowlesland/go/pkg/mod/golang.org/x/[email protected]/ipv4/batch.go:80 +0x57
        github.com/quic-go/quic-go.(*oobConn).ReadPacket(0xc000227e60)
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/sys_conn_oob.go:164 +0x5ba
        github.com/quic-go/quic-go.(*Transport).listen(0xc00035aa20, {0x7f23282249c8, 0xc000227e60})
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:299 +0x174
        created by github.com/quic-go/quic-go.(*Transport).init.func1
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:211 +0x415
        
         Goroutine 87 in state select, with github.com/quic-go/quic-go.(*Transport).runSendQueue on top of the stack:
        goroutine 87 [select]:
        github.com/quic-go/quic-go.(*Transport).runSendQueue(0xc00035aa20)
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:228 +0x113
        created by github.com/quic-go/quic-go.(*Transport).init.func1
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:212 +0x456
        
         Goroutine 9 in state select, with github.com/quic-go/quic-go.(*Transport).runSendQueue on top of the stack:
        goroutine 9 [select]:
        github.com/quic-go/quic-go.(*Transport).runSendQueue(0xc0001da360)
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:228 +0x113
        created by github.com/quic-go/quic-go.(*Transport).init.func1
        	/home/pierspowlesland/go/pkg/mod/github.com/quic-go/[email protected]/transport.go:212 +0x456
        ]
FAIL
FAIL	github.com/libp2p/go-libp2p/p2p/test/shutdown	0.464s
FAIL

This problem appears in: v0.29.2, v0.30.0 (and possibly prior versions, not yet tested)

Version Information 
github.com/libp2p/go-libp2p
cloud.google.com/go v0.65.0
cloud.google.com/go/bigquery v1.8.0
cloud.google.com/go/datastore v1.1.0
cloud.google.com/go/pubsub v1.3.1
cloud.google.com/go/storage v1.10.0
dmitri.shuralyov.com/app/changes v0.0.0-20180602232624-0a106ad413e3
dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9
dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0
dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412
dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c
git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999
github.com/AndreasBriese/bbloom v0.0.0-20190825152654-46b345b51c96
github.com/BurntSushi/toml v0.3.1
github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802
github.com/OneOfOne/xxhash v1.2.2
github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751
github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d
github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239
github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6
github.com/benbjohnson/clock v1.3.5
github.com/beorn7/perks v1.0.1
github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625
github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23
github.com/census-instrumentation/opencensus-proto v0.2.1
github.com/cespare/xxhash v1.1.0
github.com/cespare/xxhash/v2 v2.2.0
github.com/chzyer/logex v1.1.10
github.com/chzyer/readline v1.5.1
github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1
github.com/cilium/ebpf v0.9.1
github.com/client9/misspell v0.3.4
github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f
github.com/containerd/cgroups v1.1.0
github.com/coreos/etcd v3.3.10+incompatible
github.com/coreos/go-etcd v2.0.0+incompatible
github.com/coreos/go-semver v0.2.0
github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d
github.com/coreos/go-systemd/v22 v22.5.0
github.com/cpuguy83/go-md2man v1.0.10
github.com/cpuguy83/go-md2man/v2 v2.0.0
github.com/davecgh/go-spew v1.1.1
github.com/davidlazar/go-crypto v0.0.0-20200604182044-b73af7476f6c
github.com/decred/dcrd/crypto/blake256 v1.0.1
github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0
github.com/dgraph-io/badger v1.6.2
github.com/dgraph-io/ristretto v0.0.2
github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2
github.com/docker/go-units v0.5.0
github.com/dustin/go-humanize v1.0.0
github.com/elastic/gosigar v0.14.2
github.com/envoyproxy/go-control-plane v0.9.4
github.com/envoyproxy/protoc-gen-validate v0.1.0
github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568
github.com/flynn/noise v1.0.0
github.com/francoispqt/gojay v1.2.13
github.com/fsnotify/fsnotify v1.5.4
github.com/ghodss/yaml v1.0.0
github.com/gliderlabs/ssh v0.1.1
github.com/go-errors/errors v1.0.1
github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1
github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4
github.com/go-kit/kit v0.9.0
github.com/go-kit/log v0.2.0
github.com/go-logfmt/logfmt v0.5.1
github.com/go-logr/logr v1.2.4
github.com/go-stack/stack v1.8.0
github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572
github.com/godbus/dbus/v5 v5.1.0
github.com/gogo/protobuf v1.3.2
github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e
github.com/golang/lint v0.0.0-20180702182130-06c8688daad7
github.com/golang/mock v1.6.0
github.com/golang/protobuf v1.5.3
github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db
github.com/google/btree v1.0.0
github.com/google/go-cmp v0.5.9
github.com/google/go-github v17.0.0+incompatible
github.com/google/go-querystring v1.0.0
github.com/google/gofuzz v1.0.0
github.com/google/gopacket v1.1.19
github.com/google/martian v2.1.0+incompatible
github.com/google/martian/v3 v3.0.0
github.com/google/pprof v0.0.0-20230705174524-200ffdc848b8
github.com/google/renameio v0.1.0
github.com/google/uuid v1.3.0
github.com/googleapis/gax-go v2.0.0+incompatible
github.com/googleapis/gax-go/v2 v2.0.5
github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1
github.com/gorilla/websocket v1.5.0
github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7
github.com/grpc-ecosystem/grpc-gateway v1.5.0
github.com/hashicorp/golang-lru v0.5.1
github.com/hashicorp/golang-lru/v2 v2.0.2
github.com/hashicorp/hcl v1.0.0
github.com/hpcloud/tail v1.0.0
github.com/huin/goupnp v1.2.0
github.com/ianlancetaylor/demangle v0.0.0-20230524184225-eabc099b10ab
github.com/inconshreveable/mousetrap v1.0.0
github.com/ipfs/go-cid v0.4.1
github.com/ipfs/go-datastore v0.6.0
github.com/ipfs/go-detect-race v0.0.1
github.com/ipfs/go-ds-badger v0.3.0
github.com/ipfs/go-ds-leveldb v0.5.0
github.com/ipfs/go-ipfs-delay v0.0.0-20181109222059-70721b86a9a8
github.com/ipfs/go-ipfs-util v0.0.2
github.com/ipfs/go-log/v2 v2.5.1
github.com/jackpal/go-nat-pmp v1.0.2
github.com/jbenet/go-cienv v0.1.0
github.com/jbenet/go-temp-err-catcher v0.1.0
github.com/jbenet/goprocess v0.1.4
github.com/jellevandenhooff/dkim v0.0.0-20150330215556-f50fe3d243e1
github.com/jpillora/backoff v1.0.0
github.com/json-iterator/go v1.1.12
github.com/jstemmer/go-junit-report v0.9.1
github.com/julienschmidt/httprouter v1.3.0
github.com/kisielk/errcheck v1.5.0
github.com/kisielk/gotool v1.0.0
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piersy avatar Aug 23 '23 21:08 piersy

:+1: I was able to repro this. Adding a long sleep does not make this go away so it appears to be a real leak, not a lack of (*sync.WaitGroup).Wait.

func TestShutdown(t *testing.T) {
	defer goleak.VerifyNone(t)
	h1, err := libp2p.New()
	require.NoError(t, err)
	defer h1.Close()
	time.Sleep(time.Second * 10) // still fails
}

Jorropo avatar Aug 23 '23 21:08 Jorropo

@Jorropo I tried the long sleep too, but no luck :(

piersy avatar Aug 23 '23 21:08 piersy

Does this problem appear on v0.30.0 too?

p-shahi avatar Aug 23 '23 21:08 p-shahi

Yes, I have tried it with v0.30.0.

Jorropo avatar Aug 23 '23 22:08 Jorropo

@sukunrt mind taking a look?

p-shahi avatar Aug 23 '23 23:08 p-shahi

I think it's related to this: https://github.com/libp2p/go-libp2p/pull/2118

We haven't done the work to stop some services that are started by FX. In this case it might be the quicreuse stuff.

MarcoPolo avatar Aug 23 '23 23:08 MarcoPolo

Yes, using Fx would fix this. I’m not sure we’ll have the time to get this PR in before the v0.31 release, but if not, we should really prioritize it for the next one.

Adding a test using goleak seems like a good idea as well.

marten-seemann avatar Aug 24 '23 02:08 marten-seemann