Simple string breaks vscode's and github's syntax highlighting

[pushkine]

• VSCode Version: 1.42.1
• OS Version: windows_nt 1903

Paste the following line into a javascript file :

;(false ? '' : ') =>') + ''

anything coming after it won't get parsed

console.log()
Object.assign()
;(false ? '' : ') =>') + ''
console.log()
Object.assign()

...github breaks on it too, guess y'all use the same stuff

edit :
github fails on preview but still applies syntax after posting
on vscode, the first example only breaks the following line,
here is another that breaks the whole end of the file

(false ? '' : ') =>') + `${''}`

[retnikt]

this alone:

console.log()
(false ? 3 : ') =>')
console.log()

breaks it too

[pushkine]

@retnikt sure, my example forces the formatter to keep the parentheses so it eliminates the "parser is waiting for input" hypothesis as they would not be of any use otherwise

github fails on preview but still applies syntax after posting

To reproduce :

• Post that code
• Edit your post
• Confirm update

goes away on ctrl+f5

[mjbvz]

I confirmed this using the latest grammar from master. I believe the issue is that (false ? '' : ') => gets parsed as an arrow expression