[DTrace-devel] [PATCH] Initialize variable to eliminate compile-time warning

[Nick Alcock]

On 25 Apr 2022, Kris Van Hees via DTrace-devel outgrape:

> There is only a compilation error there when you use an older compiler,

GCC 12 still emits a warning.

> because it fails to recognize that the 4 cases in the switch are exactly
> the only four cases that could ever happen in this code and thus rc is
> guaranteed to always have a value.

All the compiler knows is that it's a uint :/ even LTO doesn't help.
Cross-function value range analysis is *hard*, especially over that distance.