Firebase Emulator Suite Logs crashing

[wdm954]

[REQUIRED] Environment info

firebase-tools: 8.10.0

Platform: macOS

[REQUIRED] Test case

n/a

[REQUIRED] Steps to reproduce

Open Logs tab in Firebase Emulator Suite.

Note: this only started to happen after I started using Firebase logger in Firebase functions.

[REQUIRED] Expected behavior

not crashing

[REQUIRED] Actual behavior

crashing with error:

react-dom.production.min.js:209 TypeError: Cannot read property 'mode' of undefined
    at HighlightedJSON.tsx:174
    at Array.map (<anonymous>)
    at Hr (HighlightedJSON.tsx:95)
    at Qo (react-dom.production.min.js:153)
    at ms (react-dom.production.min.js:261)
    at cu (react-dom.production.min.js:246)
    at su (react-dom.production.min.js:246)
    at Zs (react-dom.production.min.js:239)
    at react-dom.production.min.js:123
    at e.unstable_runWithPriority (scheduler.production.min.js:19)

[samtstern]

@wdm954 transferring this issue over to the firebase-tools-ui repo.

[zprice-invsqr]

This error happens while a JSON string is being formatted. lines that end with {} or {}, are incorrectly handled here, causing the next line to fail. The following logging from a cloud function reproduces the issue:

console.log(JSON.stringify({
    "this line": "is quite fine",
    "teh problematic boi": {},
    "innocent bystander": "(ಥ﹏ಥ)", // this line required for exception to be thrown
}));

[sam-gc]

Thanks for reaching out with the report!