Pattern: Use of unset with unquoted argument
Issue: -
Arguments to unset are subject to regular glob expansion. This is especially relevant when unsetting indices in arrays, where [..] is considered a glob character group.
Example of incorrect code:
unset foo[index]Having a file called food in the current directory will result in unset foo[index] expanding to unset food, which will silently succeed without unsetting the element.
Quoting so that the [..] is passed literally to unset solves the issue.
Example of correct code:
unset 'foo[index]'