test: reset a signal handler before closing a signal channel
test: reset a signal handler before closing a signal channel

goroutine 5 [running]:
os/signal.process(0x10e21c0, 0xc00050c280)
        third_party/go/gc/src/os/signal/signal.go:227 +0x164
os/signal.loop()
        third_party/go/gc/src/os/signal/signal_unix.go:23 +0x3e
created by os/signal.init.0
        third_party/go/gc/src/os/signal/signal_unix.go:29 +0x41

PiperOrigin-RevId: 264518530

google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor