functions.logger throws an exception when attempting to log null

[arthurM2x]

[REQUIRED] Version info

**node:**10

**firebase-functions:**3.7.0

**firebase-tools:**8.4.3

**firebase-admin:**8.10.0

[REQUIRED] Test case

import * as functions from 'firebase-functions'

// throws an exception
functions.logger.log('something', null)

[REQUIRED] Steps to reproduce

attempt to log null

[REQUIRED] Expected behavior

no exception

[REQUIRED] Actual behavior

exception thrown:

TypeError: Cannot read property 'constructor' of null
at entryFromArgs (/workspace/node_modules/firebase-functions/lib/logger.js:78:47)
at Object.log (/workspace/node_modules/firebase-functions/lib/logger.js:45:11)

https://github.com/firebase/firebase-functions/blob/master/src/logger.ts#L107
src/logger.ts:107
if (typeof lastArg == 'object' && lastArg.constructor == Object) {

typeof null -> "object"
so would be beneficial to add a null check there

Were you able to successfully deploy your functions?

Yes

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[rhodgkins]

Any ideas on when this is going to get released?