Julia: [Stdlib] Random : calling randjump results in UndefRefError

[fisiognomico]

Writing something like

const TRNG = randjump(GLOBAL_RNG, big(10)^20, 4)

in a Julia source\REPL of course works.
But if I try to append it to the code in RNG.jl, right after randjump definition, I get a UndefRefErrorduring Random compilation :

DelimitedFiles  ─  2.354190 seconds
error during bootstrap:
LoadError("sysimg.jl", 493, LoadError("/home/rodia/dev/RNG-julia/usr/share/julia/stdlib/v0.7/Random/src/Random.jl", 254, LoadError("/home/rodia/dev/RNG-julia/usr/share/julia/stdlib/v0.7/Random/src/RNGs.jl", 586, UndefRefError())))
rec_backtrace at /home/rodia/dev/RNG-julia/src/stackwalk.c:94
record_backtrace at /home/rodia/dev/RNG-julia/src/task.c:246
jl_throw at /home/rodia/dev/RNG-julia/src/task.c:577
getproperty at ./sysimg.jl:18 [inlined]
getindex at ./refvalue.jl:32 [inlined]
calc_jump at /home/rodia/dev/RNG-julia/usr/share/julia/stdlib/v0.7/Random/src/DSFMT.jl:176 [inlined]
randjump at /home/rodia/dev/RNG-julia/usr/share/julia/stdlib/v0.7/Random/src/RNGs.jl:561 [inlined]
init_TRNG at /home/rodia/dev/RNG-julia/usr/share/julia/stdlib/v0.7/Random/src/RNGs.jl:580 [inlined]
init_TRNG at /home/rodia/dev/RNG-julia/usr/share/julia/stdlib/v0.7/Random/src/RNGs.jl:584
jl_fptr_trampoline at /home/rodia/dev/RNG-julia/src/gf.c:1813
jl_apply_generic at /home/rodia/dev/RNG-julia/src/gf.c:2142
do_call at /home/rodia/dev/RNG-julia/src/interpreter.c:324
eval_value at /home/rodia/dev/RNG-julia/src/interpreter.c:428
eval_stmt_value at /home/rodia/dev/RNG-julia/src/interpreter.c:363 [inlined]
eval_body at /home/rodia/dev/RNG-julia/src/interpreter.c:671
jl_interpret_toplevel_thunk_callback at /home/rodia/dev/RNG-julia/src/interpreter.c:788
unknown function (ip: 0xfffffffffffffffe)
unknown function (ip: 0x7fb65625f7ef)
unknown function (ip: (nil))
jl_interpret_toplevel_thunk at /home/rodia/dev/RNG-julia/src/interpreter.c:797
jl_toplevel_eval_flex at /home/rodia/dev/RNG-julia/src/toplevel.c:814
jl_parse_eval_all at /home/rodia/dev/RNG-julia/src/ast.c:854
jl_load at /home/rodia/dev/RNG-julia/src/toplevel.c:848
include at ./boot.jl:317 [inlined]
include_relative at ./loading.jl:1075
include at ./sysimg.jl:29 [inlined]
include at /home/rodia/dev/RNG-julia/usr/share/julia/stdlib/v0.7/Random/src/Random.jl:5
jl_apply_generic at /home/rodia/dev/RNG-julia/src/gf.c:2142
do_call at /home/rodia/dev/RNG-julia/src/interpreter.c:324
eval_value at /home/rodia/dev/RNG-julia/src/interpreter.c:428
eval_stmt_value at /home/rodia/dev/RNG-julia/src/interpreter.c:363 [inlined]
eval_body at /home/rodia/dev/RNG-julia/src/interpreter.c:671
jl_interpret_toplevel_thunk_callback at /home/rodia/dev/RNG-julia/src/interpreter.c:788
unknown function (ip: 0xfffffffffffffffe)
unknown function (ip: 0x7fb657524fcf)
unknown function (ip: 0xffffffffffffffff)
jl_interpret_toplevel_thunk at /home/rodia/dev/RNG-julia/src/interpreter.c:797
jl_toplevel_eval_flex at /home/rodia/dev/RNG-julia/src/toplevel.c:814
jl_eval_module_expr at /home/rodia/dev/RNG-julia/src/toplevel.c:233
jl_toplevel_eval_flex at /home/rodia/dev/RNG-julia/src/toplevel.c:605
jl_parse_eval_all at /home/rodia/dev/RNG-julia/src/ast.c:854
jl_load at /home/rodia/dev/RNG-julia/src/toplevel.c:848
include at ./boot.jl:317 [inlined]
include_relative at ./loading.jl:1075
_require at ./loading.jl:998
require at ./loading.jl:879
require at ./loading.jl:874
jl_apply_generic at /home/rodia/dev/RNG-julia/src/gf.c:2142
do_call at /home/rodia/dev/RNG-julia/src/interpreter.c:324
eval_value at /home/rodia/dev/RNG-julia/src/interpreter.c:428
eval_body at /home/rodia/dev/RNG-julia/src/interpreter.c:554
jl_interpret_toplevel_thunk_callback at /home/rodia/dev/RNG-julia/src/interpreter.c:788
unknown function (ip: 0xfffffffffffffffe)
unknown function (ip: 0x7fb6578a68ef)
unknown function (ip: 0x26)
jl_interpret_toplevel_thunk at /home/rodia/dev/RNG-julia/src/interpreter.c:797
jl_toplevel_eval_flex at /home/rodia/dev/RNG-julia/src/toplevel.c:814
jl_parse_eval_all at /home/rodia/dev/RNG-julia/src/ast.c:854
jl_load at /home/rodia/dev/RNG-julia/src/toplevel.c:848
exec_program at /home/rodia/dev/RNG-julia/ui/repl.c:36
true_main at /home/rodia/dev/RNG-julia/ui/repl.c:124
main at /home/rodia/dev/RNG-julia/ui/repl.c:243
__libc_start_main at /usr/lib/libc.so.6 (unknown line)
_start at /home/rodia/dev/RNG-julia/usr/bin/julia (unknown line)

*** This error is usually fixed by running `make clean`. If the error persists, try `make cleanall`. ***
make[1]: *** [Makefile:201: /home/rodia/dev/RNG-julia/usr/lib/julia/sys-o.a] Error 1
make: *** [Makefile:78: julia-sysimg-release] Error 2

make cleanalldoes not solve the issue.
I am sorry if there is an answer for this elsewhere, but after searching the docs and asking on discourse I am still at the same point.

[KristofferC]

https://github.com/JuliaLang/julia/blob/92879ea7802804a0c16f70c081c56773ce3946a9/stdlib/Random/src/DSFMT.jl#L159

is not set yet, leading to the error in

https://github.com/JuliaLang/julia/blob/92879ea7802804a0c16f70c081c56773ce3946a9/stdlib/Random/src/DSFMT.jl#L174-L180

[StefanKarpinski]

I'm not sure this is expected to work, so seems like not a bug?

[rfourquet]

For reference, here the link to the mentioned discourse thread.

Concerning this issue, yes initializing global objects in Base/stdlib can be tricky. I guess you could define an empty array, and fill it up at __init__ time with "jumped" RNGs, either by using copyto! from the array produced by randjump into your global array, or with Future.randjump.

It's not clear what you want to achieve here, but I see nothing actionable in this issue, and I also don't think this is expected to work.