DataFrames hangs when using master commits after #12c51d7...

[milktrader]

This was first observed here: JuliaData/DataFrames.jl#216

The problem is somewhere between 12c51d7a8da702b4a25c1774b7bebbd2aae2e21d Rename known-mean variants to stdm and varm. and c3418cb11833480138a5c476568b3eb56ed07ce7 fix #2562

That's a pretty wide range of commits

[kmsquire]

Just to clarify, c3418cb, mentioned above, is the actual commit which breaks DataFrames. The commit before that (bcfc42d) is fine.

[kmsquire]

More information:

This DataArray constructor:

https://github.com/HarlanH/DataFrames.jl/blob/master/src/dataarray.jl#L74

seems to be causing julia's inference to get caught in an infinite loop:

julia> d = [1,2,3]
3-element Int64 Array:
 1
 2
 3

julia> m = trues(3)
3-element BitArray:
 true
 true
 true

julia> DataArray(d,m)
^C^CError showing value of type DataArray{Int64,1}:
ERROR: interrupt
 in abstract_eval_call at inference.jl:694
 in abstract_eval at inference.jl:713
 in abstract_eval_arg at inference.jl:665
 in typeinf at inference.jl:1210
 in abstract_call_gf at inference.jl:561
 in abstract_call at inference.jl:638
 in abstract_eval_call at inference.jl:696
 in abstract_eval at inference.jl:713
 in abstract_eval_arg at inference.jl:665
 in typeinf at inference.jl:1210
 in abstract_call_gf at inference.jl:561
 in abstract_call at inference.jl:638
 in abstract_eval_call at inference.jl:696
 in abstract_eval at inference.jl:713
 in abstract_eval_arg at inference.jl:665
 in typeinf at inference.jl:1210

[kmsquire]

cc: @JeffBezanson

As noted above, this worked before commit c3418cb. The problem could still be with the DataArray constructor definition, but it would still be better not to get into an infinite loop.

[JeffBezanson]

Ok, that should fix it. Please try it out.

[kmsquire]

That did it, thanks!

[milktrader]

works for me too, using DataFrames 400cb39 before the temp fix commit

[milktrader]

This should also close JuliaData/DataFrames.jl#216 and JuliaStats/RDatasets.jl#9