These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.04 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/userspace-rcu-0.15.6:0/8::gentoo  USE="-static-libs -test -verify-sig" 670 KiB
[ebuild  N     ] sci-mathematics/z3-5.3.1:0/5.3::gentoo  USE="gmp python -doc -examples -isabelle -java" PYTHON_SINGLE_TARGET="python3_14 -python3_12 -python3_13 (-python3_15)" 7685 KiB
[ebuild  N     ] dev-util/lttng-ust-compat-2.12.10:0/2.12::gentoo  USE="-numa -verify-sig" 783 KiB
[ebuild  N     ] dev-lang/dafny-bin-4.11.0-r1::gentoo  63778 KiB

Total: 4 packages (4 new), Size of downloads: 72915 KiB