Crash "WRITE_EXCL is not defined"

[gramakri]

system info

Using haraka 4e59e3a.

Steps to reproduce

Not sure how to reproduce but we got the following backtrace:

Jul 21 08:38:33 domain.com dockerd[1377]: [CRIT] [-] [core] ReferenceError: WRITE_EXCL is not defined
Jul 21 08:38:33 domain.com dockerd[1377]: [CRIT] [-] [core]     at split_to_new_recipients (/app/haraka/outbound/hmail.js:1278:54)
Jul 21 08:38:33 domain.com dockerd[1377]: [CRIT] [-] [core]     at finish_processing_mail (/app/haraka/outbound/hmail.js:594:13)
Jul 21 08:38:33 domain.com dockerd[1377]: [CRIT] [-] [core]     at pluggableStream.<anonymous> (/app/haraka/outbound/hmail.js:833:29)
Jul 21 08:38:33 domain.com dockerd[1377]: [CRIT] [-] [core]     at emitOne (events.js:96:13)
Jul 21 08:38:33 domain.com dockerd[1377]: [CRIT] [-] [core]     at pluggableStream.emit (events.js:188:7)
Jul 21 08:38:33 domain.com dockerd[1377]: [CRIT] [-] [core]     at pluggableStream.socket.process_data (/app/haraka/line_socket.js:24:20)
Jul 21 08:38:33 domain.com dockerd[1377]: [CRIT] [-] [core]     at pluggableStream.<anonymous> (/app/haraka/line_socket.js:35:48)
Jul 21 08:38:33 domain.com dockerd[1377]: [CRIT] [-] [core]     at emitOne (events.js:96:13)
Jul 21 08:38:33 domain.com dockerd[1377]: [CRIT] [-] [core]     at pluggableStream.emit (events.js:188:7)
Jul 21 08:38:33 domain.com dockerd[1377]: [CRIT] [-] [core]     at Socket.<anonymous> (/app/haraka/tls_socket.js:54:14)

Upstream bug: https://git.cloudron.io/cloudron/box/issues/382