[Bug c/82792] Fallthrough attribute ignored after label

[michael.thayer at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82792

--- Comment #6 from Michael Thayer <michael.thayer at oracle dot com> ---
Created attachment 42514
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42514&action=edit
New test case