RUN   TestIntegration_CancelWrite/grpc
panic: close of closed channel

goroutine 90502 [running]:
[cloud.google.com/go/storage.(*gRPCWriter).Close(..](http://cloud.google.com/go/storage.(*gRPCWriter).Close(..).)
	/tmpfs/src/google-cloud-[go/storage/grpc_writer.go:118](http://goto.google.com/storage/grpc_writer.go:118)
[cloud.google.com/go/storage.(*gRPCWriter).CloseWithError(0xc00787d680](http://cloud.google.com/go/storage.(*gRPCWriter).CloseWithError(0xc00787d680), {0x23b5b80, 0x318a4a0})
	/tmpfs/src/google-cloud-[go/storage/grpc_writer.go:132](http://goto.google.com/storage/grpc_writer.go:132) +0x1b7
[cloud.google.com/go/storage.(*Writer).CloseWithError(..](http://cloud.google.com/go/storage.(*Writer).CloseWithError(..).)
	/tmpfs/src/google-cloud-[go/storage/writer.go:340](http://goto.google.com/storage/writer.go:340)
[cloud.google.com/go/storage.(*Writer).monitorCancel(0xc00173c008)](http://cloud.google.com/go/storage.(*Writer).monitorCancel(0xc00173c008))
	/tmpfs/src/google-cloud-[go/storage/writer.go:327](http://goto.google.com/storage/writer.go:327) +0x211
created by [cloud.google.com/go/storage.(*Writer).openWriter](http://cloud.google.com/go/storage.(*Writer).openWriter) in goroutine 90501
	/tmpfs/src/google-cloud-[go/storage/writer.go:311](http://goto.google.com/storage/writer.go:311) +0x111d
FAIL	[cloud.google.com/go/storage](http://cloud.google.com/go/storage)	393.682s
FAIL