E0152: legacy octal literals may not contain underscores
A legacy octal literal is a 0 digit followed by one or more octal digits (0
through 7). It is a syntax error for a legacy octal literal to contain a digit
separator (_):
let fileMode = 01_755;
To fix this error, begin the literal with 0o:
let fileMode = 0o1_755;
Alternatively, remove the underscore:
let fileMode = 01755;
Introduced in quick-lint-js version 0.2.0.