Porting old fix for issue for StringIndexOutOfBoundsException

[kamilkrzywanski]

I don't have time to create reproducer, but when changed compiler to ECJ with huge monolitc project I also had this error and fixed with this path.
querydsl/codegen#40

[github-actions]

This issue has been automatically closed because the author did not indicate they are willing to put in the effort needed to resolve it.