vibe-core fails to compile with dub build profile "profile"

[vnayar]

When compiling using dub and the "profile" build profile, vibe-core has the following warnings which prevent successful compilation:

$ dub build --build=profile

/usr/include/dmd/phobos/std/concurrency.d(2160,17): Warning: statement is not reachable
../../.dub/packages/vibe-core-1.22.4/vibe-core/source/vibe/internal/async.d-mixin-164(190,7): Warning: statement is not reachable
../../.dub/packages/vibe-core-1.22.4/vibe-core/source/vibe/internal/async.d-mixin-164(191,7): Warning: statement is not reachable