access to undefined reference in seed_threadrngs!

[colinxs]

Ran into this:

(LyceumAI) pkg> test
   Testing LyceumAI
 Resolving package versions...
LyceumAI.jl: Error During Test at /home/colinxs/workspace/juliadev/LyceumAI/test/runtests.jl:30
  Got exception outside of a @test
  TaskFailedException:
  UndefRefError: access to undefined reference
  Stacktrace:
   [1] getindex at ./array.jl:744 [inlined]
   [2] ht_keyindex2!(::Dict{BigInt,Random.DSFMT.GF2X}, ::BigInt) at ./dict.jl:326
   [3] setindex!(::Dict{BigInt,Random.DSFMT.GF2X}, ::Random.DSFMT.GF2X, ::BigInt) at ./dict.jl:381
   [4] calc_jump(::BigInt, ::Random.DSFMT.GF2X) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.3/Random/src/DSFMT.jl:179
   [5] calc_jump at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.3/Random/src/DSFMT.jl:177 [inlined]
   [6] randjump at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.3/Future/src/Future.jl:39 [inlined]
   [7] macro expansion at /home/colinxs/.julia/packages/LyceumBase/jOq5k/src/Tools/threading.jl:21 [inlined]
   [8] (::LyceumBase.Tools.var"#750#threadsfor_fun#52"{BigInt,Array{Random.MersenneTwister,1},UnitRange{Int64}})(::Bool) at ./threadingconstructs.jl:61
   [9] (::LyceumBase.Tools.var"#750#threadsfor_fun#52"{BigInt,Array{Random.MersenneTwister,1},UnitRange{Int64}})() at ./threadingconstructs.jl:28
  Stacktrace:
   [1] wait(::Task) at ./task.jl:251
   [2] macro expansion at ./threadingconstructs.jl:69 [inlined]
   [3] #seed_threadrngs!#51(::BigInt, ::typeof(seed_threadrngs!), ::Array{Random.MersenneTwister,1}, ::Int64) at /home/colinxs/.julia/packages/LyceumBase/jOq5k/src/Tools/threading.jl:18
   [4] #seed_threadrngs! at ./none:0 [inlined]
   [5] #seed_threadrngs!#50 at /home/colinxs/.julia/packages/LyceumBase/jOq5k/src/Tools/threading.jl:4 [inlined]
   [6] seed_threadrngs!(::Int64) at /home/colinxs/.julia/packages/LyceumBase/jOq5k/src/Tools/threading.jl:4
   [7] top-level scope at /home/colinxs/workspace/juliadev/LyceumAI/test/runtests.jl:32
   [8] top-level scope at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.3/Test/src/Test.jl:1107
   [9] top-level scope at /home/colinxs/workspace/juliadev/LyceumAI/test/runtests.jl:32
   [10] include at ./boot.jl:328 [inlined]
   [11] include_relative(::Module, ::String) at ./loading.jl:1105
   [12] include(::Module, ::String) at ./Base.jl:31
   [13] include(::String) at ./client.jl:424
   [14] top-level scope at none:6
   [15] eval(::Module, ::Any) at ./boot.jl:330
   [16] exec_options(::Base.JLOptions) at ./client.jl:263
   [17] _start() at ./client.jl:460

coming from

LyceumBase.jl/src/Tools/threading.jl

Line 7 in f9d1332

function seed_threadrngs!(

Not really sure how this is happening as we clearly assign to rngs[1]. 0675394 adds a few "hail mary" attemps to fix this, namely 1) not inlining the function and 2) using a local variable MT for the call to randjump, but I don't see how this would actually do anything to address the issue (it should be semantically the same thing?!). That commit also adds some assert statements to hopefully catch the issue before the UndefRefError.

This issue is mostly just to track the problem and see if it comes up again.

[colinxs]

Just ran into it again when running pkg> test...

[colinxs]

So I think the issue is in how I'm testing, not in seed_threadrngs! itself