precompilation fails on julia v1.4-rc2

[baggepinnen]

julia> using CSV
[ Info: Precompiling CSV [336ed68f-0bac-5ca0-87d4-7b16caf5d00b]
ERROR: LoadError: UndefVarError: AbstractRow not defined
Stacktrace:
 [1] getproperty(::Module, ::Symbol) at ./Base.jl:26
 [2] top-level scope at /home/fredrikb/.julia/packages/CSV/DOr2V/src/CSV.jl:56
 [3] include(::Module, ::String) at ./Base.jl:377
 [4] top-level scope at none:2
 [5] eval at ./boot.jl:331 [inlined]
 [6] eval(::Expr) at ./client.jl:449
 [7] top-level scope at ./none:3
in expression starting at /home/fredrikb/.julia/packages/CSV/DOr2V/src/CSV.jl:56
ERROR: Failed to precompile CSV [336ed68f-0bac-5ca0-87d4-7b16caf5d00b] to /home/fredrikb/.julia/compiled/v1.4/CSV/HHBkp_YbV1A.ji.
Stacktrace:
 [1] error(::String) at ./error.jl:33
 [2] compilecache(::Base.PkgId, ::String) at ./loading.jl:1272
 [3] _require(::Base.PkgId) at ./loading.jl:1029
 [4] require(::Base.PkgId) at ./loading.jl:927
 [5] require(::Module, ::Symbol) at ./loading.jl:922

(felipe) pkg> st
Status `~/felipe/Project.toml`
  [336ed68f] CSV v0.5.26
  [717857b8] DSP v0.6.3
  [a93c6f00] DataFrames v0.20.1
  [26dcc766] LPVSpectral v0.2.0 #master (https://github.com/baggepinnen/LPVSpectral.jl.git)
  [d3d80556] LineSearches v7.0.1
  [429524aa] Optim v0.20.2
  [91a5bcdd] Plots v0.29.6
  [1a8c2f83] Query v0.12.2
  [2913bbd2] StatsBase v0.32.2
  [f3b207a7] StatsPlots v0.14.1

[baggepinnen]

It turns out that Tables had been baked into my sysimage at an old version and the version that appeared to be used was not correct. Sorry for the noise!