UnhandledPromiseRejectionWarning in IMAP handler

Hi,

I randomly get this error when the connection has been open for about one to six hours (outlook.office.com IMAP server). It does trigger client.onerror but can’t be caught by a catch on the client’s methods.

Running on heroku with node ^10.

Haven’t been able to reproduce it at will (it just happens on its own after some time, at which point I create a new client and reconnect and it works fine until it happens again, etc).

(node:20) UnhandledPromiseRejectionWarning: Error: Unexpected char at position 18
    at ParserInstance.getElement (/app/node_modules/emailjs-imap-handler/dist/parser.js:152:17)
    at ParserInstance.getCommand (/app/node_modules/emailjs-imap-handler/dist/parser.js:112:29)
    at exports.default (/app/node_modules/emailjs-imap-handler/dist/parser.js:17:29)
    at Imap._parseIncomingCommands (/app/node_modules/emailjs-imap-client/dist/imap.js:577:51)
    at Imap._onData (/app/node_modules/emailjs-imap-client/dist/imap.js:428:10)
    at TCPSocket.socket.ondata.evt (/app/node_modules/emailjs-imap-client/dist/imap.js:160:16)
    at TCPSocket._emit (/app/node_modules/emailjs-tcp-socket/dist/node-socket.js:103:31)
    at TLSSocket.<anonymous> (/app/node_modules/emailjs-tcp-socket/dist/node-socket.js:69:23)
    at TLSSocket.emit (events.js:182:13)
    at addChunk (_stream_readable.js:283:12)

[SunriseFox]

Yet another kind of uncaught error popped up while the IMAP client was idling:

UnhandledPromiseRejectionWarning: Error:  Socket timed out! 
    at Timeout._socketTimeoutTimer.setTimeout (/app/node_modules/emailjs-imap-client/dist/imap.js:365:63) 
    at ontimeout (timers.js:425:11) 
    at tryOnTimeout (timers.js:289:5) 
    at listOnTimeout (timers.js:252:5) 
    at Timer.processTimers (timers.js:212:10) 

It’s not entirely surprising that some network errors may occur after hours of keeping a connection alive, and it’s easy enough to reconnect. The only problem I have here is the uncaught bit. Someday this will make Node.js just crash.

See #195 … I think it is the problem.

[cormip]

Also seeing the UnhandledPromiseRejectionWarning: Error: Unexpected char at position 18 error. It’s definitely occuring while the IMAP client is simply idling (not retrieving a message). The host I’m connected to is imap-mail.outlook.com:

2018-12-14 01:16:55-05:00(node:7) UnhandledPromiseRejectionWarning: Error: Unexpected char at position 18
2018-12-14 01:16:55-05:00 at ParserInstance.getElement (/app/bundle/programs/server/npm/node_modules/emailjs-imap-handler/dist/parser.js:152:17)
2018-12-14 01:16:55-05:00 at ParserInstance.getCommand (/app/bundle/programs/server/npm/node_modules/emailjs-imap-handler/dist/parser.js:112:29)
2018-12-14 01:16:55-05:00 at exports.default (/app/bundle/programs/server/npm/node_modules/emailjs-imap-handler/dist/parser.js:17:29)
2018-12-14 01:16:55-05:00 at Imap._parseIncomingCommands (/app/bundle/programs/server/npm/node_modules/emailjs-imap-client/dist/imap.js:577:51)
2018-12-14 01:16:55-05:00 at Imap._onData (/app/bundle/programs/server/npm/node_modules/emailjs-imap-client/dist/imap.js:428:10)
2018-12-14 01:16:55-05:00 at TCPSocket.socket.ondata.evt (/app/bundle/programs/server/npm/node_modules/emailjs-imap-client/dist/imap.js:160:16)
2018-12-14 01:16:55-05:00 at TCPSocket._emit (/app/bundle/programs/server/npm/node_modules/emailjs-tcp-socket/dist/node-socket.js:103:31)
2018-12-14 01:16:55-05:00 at TLSSocket.<anonymous> (/app/bundle/programs/server/npm/node_modules/emailjs-tcp-socket/dist/node-socket.js:69:23)
2018-12-14 01:16:55-05:00 at emitOne (events.js:116:13)
2018-12-14 01:16:55-05:00 at TLSSocket.emit (events.js:211:7)
2018-12-14 01:16:55-05:00 at addChunk (_stream_readable.js:263:12)
2018-12-14 01:16:55-05:00 at readableAddChunk (_stream_readable.js:250:11)
2018-12-14 01:16:55-05:00 at TLSSocket.Readable.push (_stream_readable.js:208:10)
2018-12-14 01:16:55-05:00 at TLSWrap.onread (net.js:597:20)
2018-12-14 01:16:55-05:00(node:7) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 158)