E0050: hex number literal has no digits
Hexadecimal (hex) number literals start with 0x and require at least one
digit. It is an error to write 0x with no following digits:
let mask = 0x
To fix this error, write digits after 0x:
let mask = 0xff00;
Alternatively, remove x to create a 0 number literal.
Introduced in quick-lint-js version 0.2.0.