[Bug c/107931] [12 Regression] -Og causes always_inline to fail

[me at xenu dot pl via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107931

--- Comment #1 from Tomasz Konojacki <me at xenu dot pl> ---
(In reply to Tomasz Konojacki from comment #0)
> The error below occurs only with -Od.

Sorry, -Og.

PS. It seems that moving the definition of fun4 to the first line
makes the error disappear.