[perl #112874] Heap corrupted by regex involving (?| ... ) and ($0)

Sending updated bug demo, as an attachment this time.

If the alternations inside (?| ... ) are swapped, or a 3rd alternation
added, the crash does not happen.  See comment in the attached

• [perl #112874] Heap corrupted by regex involving (?| ... ) and ($0) by Jim Avera via RT
• [perl #112874] Heap corrupted by regex involving (?| ... ) and ($0) by Jim Avera
• Re: [perl #112874] Heap corrupted by regex involving (?| ... ) and($0) by Dave Mitchell
• Re: [perl #112874] Heap corrupted by regex involving (?| ... ) and ($0) by demerphq
• Re: [perl #112874] Heap corrupted by regex involving (?| ... ) and($0) by Nicholas Clark