Bug 5232: Fix GCC v12 build [-Wuse-after-free] (#1136)

Bug 5232: Fix GCC v12 build [-Wuse-after-free] (#1136)

This warning is a false positive. Introduced in GCC v12, use-after-free
checks have attracted dozens of bug reports, with several reports still
open as of GCC v12.2, including one that looks very similar to our case:
https://gcc.gnu.org/bugzilla//show_bug.cgi?id=106776

Removing (excessive) "inline" works around this GCC bug. We do not have
a better workaround right now. If we see more false positives like this,
we may disable -Wuse-after-free until its support matures.