Wash fails with "send on closed channel"

[MikaelSmith]

I was exploring Wash in a GCP instance. I tabbed to auto-complete ls fs/, then hit Ctrl-C almost immediately. Wash panicked with

wash gcp/Wash/compute/michael-test-instance ❯ ls fs/WARN FUSE: List /gcp/Wash/compute/michael-test-instance/fs errored: exec errored: [context canceled context canceled]
                                              ls fs/panic: send on closed channel
Killed by signal in _path_files after 0s
goroutine 1782 [running]:
github.com/puppetlabs/wash/plugin.(*OutputStream).sendError(...)
	/Users/michaelsmith/puppetlabs/wash/plugin/outputStream.go:25
github.com/puppetlabs/wash/plugin.(*OutputStream).WriteWithTimestamp(0xc00181b4f0, 0xbf64a8c844c85d80, 0x60a7c2213f, 0x7189480, 0xc001998000, 0x32, 0x8000, 0x0, 0x0)
	/Users/michaelsmith/puppetlabs/wash/plugin/outputStream.go:32 +0xf7
github.com/puppetlabs/wash/plugin.(*OutputStream).Write(0xc00181b4f0, 0xc001998000, 0x32, 0x8000, 0x32, 0x0, 0x0)
	/Users/michaelsmith/puppetlabs/wash/plugin/outputStream.go:42 +0x6f
io.copyBuffer(0x613b4a0, 0xc00181b4f0, 0x7f93318, 0xc001734cc0, 0xc001998000, 0x8000, 0x8000, 0x616d3c0, 0xc0017d4540, 0x8)
	/usr/local/Cellar/go/1.13.3/libexec/src/io/io.go:404 +0x1fb
io.Copy(...)
	/usr/local/Cellar/go/1.13.3/libexec/src/io/io.go:364
golang.org/x/crypto/ssh.(*Session).stdout.func1(0x0, 0x0)
	/Users/michaelsmith/.go/pkg/mod/golang.org/x/[email protected]/ssh/session.go:511 +0x8c
golang.org/x/crypto/ssh.(*Session).start.func1(0xc010820870, 0xc0108b1890)
	/Users/michaelsmith/.go/pkg/mod/golang.org/x/[email protected]/ssh/session.go:383 +0x27
created by golang.org/x/crypto/ssh.(*Session).start
	/Users/michaelsmith/.go/pkg/mod/golang.org/x/[email protected]/ssh/session.go:382 +0xfe

zsh: error on TTY read: Input/output error