Fix "Out of bounds" crash on iOS

[tomekzaw]

Details

This PR fixes the following crash on iOS

NSMutableRLEArray objectAtIndex:effectiveRange:: Out of bounds

when returning improper ranges, in particular:

1. when passing a range with zero length, e.g. { start: 10, length: 0, type: 'code' }

2. when passing a range that is longer than the string itself, e.g. { start: 0, length: 9999, type: 'bold' }

Related Issues

GH_LINK

Manual Tests

Linked PRs