This looks intentional. Just a more down-to-earth way of saying that such errors might be discovered deeply nested within subroutines. Paul Vojta On Mon, Nov 29, 2021 at 09:39:31AM +0700, Igor Liferenko wrote: > Hi, > > Such errors might be discovered inside of subroutines inside of > subroutines... > > "inside of subroutines" is repeated twice > > --Igor