Installing Octavian fails due to undefined `maybestaticlength`

When trying to install Octavian on a fresh Julia 1.6.1 installation (with an empty ~/.julia folder), it currently fails with the following error (after doing ] add Octavian:

[...]
Precompiling project...
  ✗ Octavian
  21 dependencies successfully precompiled in 28 seconds
  1 dependency errored. To see a full report either run `import Pkg; Pkg.precompile()` or load the package

Running the suggested commands, I get

julia> import Pkg; Pkg.precompile()
Precompiling project...
  ✗ Octavian
  0 dependencies successfully precompiled in 3 seconds (21 already precompiled)

ERROR: The following 1 direct dependency failed to precompile:

Octavian [6fd5a793-0b7e-452c-907f-f8bfe9c57db4]

ERROR: LoadError: UndefVarError: maybestaticsize not defined
Stacktrace:
 [1] include
   @ ./Base.jl:386 [inlined]
 [2] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt64}}, source::Nothing)
   @ Base ./loading.jl:1213
 [3] top-level scope
   @ none:1
 [4] eval
   @ ./boot.jl:360 [inlined]
 [5] eval(x::Expr)
   @ Base.MainInclude ./client.jl:446
 [6] top-level scope
   @ none:1
in expression starting at /home/mschlott/.julia/packages/Octavian/KFBPM/src/Octavian.jl:1
Stacktrace:
 [1] pkgerror(msg::String)
   @ Pkg.Types /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/Pkg/src/Types.jl:55
 [2] precompile(ctx::Pkg.Types.Context; internal_call::Bool, strict::Bool, kwargs::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
   @ Pkg.API /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/Pkg/src/API.jl:1244
 [3] precompile
   @ /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/Pkg/src/API.jl:920 [inlined]
 [4] #precompile#196
   @ /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/Pkg/src/API.jl:918 [inlined]
 [5] precompile()
   @ Pkg.API /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/Pkg/src/API.jl:918
 [6] top-level scope
   @ REPL[3]:1

julia>

I assume it's related to the patch release of LoopVectorization (v0.12.39) from ~two hours ago, which from the diff at least seems to be messing with the complained about maybestaticlength. Unfortunately, here I've reached the limits of my understanding of the internals of LoopVec and VecBase and hope that someone else already knows what's happening :-)

JuliaLinearAlgebra / Octavian.jl

Installing Octavian fails due to undefined `maybestaticlength` #100