TS8011
Retired number
A gap (8011 and 8012 are retired) is never reused.
This number is retired. No diagnostic carries it, and the registry never gives it to another rule.
The registry text and every compiler message on these pages are the compiler's own English.
When it fires
A gap (8011 and 8012 are retired) is never reused. A block's unused codes stay unused, exactly as 8011 does — a gap is never reused.
See also
Source
The compiler source names this code nowhere outside its registry.