autopkgtest fails in hirsute on amd64

https://autopkgtest.ubuntu.com/packages/d/delve/hirsute/amd64

https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-hirsute/hirsute/amd64/d/delve/20210316_172357_fd868@/log.gz
...
=== RUN TestIssue419
Start
Receive signal interrupt
End
    proc_unix_test.go:63: Unexpected error after Continue(): <nil>
--- FAIL: TestIssue419 (1.21s)
=== RUN TestScopeWithEscapedVariable
panic: send on closed channel

goroutine 1051 [running]:
github.com/go-delve/delve/pkg/proc_test.TestIssue419.func1.1(0xc00013a240, 0xc000386100, 0xc00074e5a0)
 /tmp/autopkgtest.uxoxPr/autopkgtest_tmp/obj-x86_64-linux-gnu/src/github.com/go-delve/delve/pkg/proc/proc_unix_test.go:48 +0x214
created by github.com/go-delve/delve/pkg/proc_test.TestIssue419.func1
 /tmp/autopkgtest.uxoxPr/autopkgtest_tmp/obj-x86_64-linux-gnu/src/github.com/go-delve/delve/pkg/proc/proc_unix_test.go:37 +0x13e
FAIL github.com/go-delve/delve/pkg/proc 123.963s
=== RUN TestSplicedReader
...