<p dir="auto">e.g. in <a href="https://build.julialang.org/#/builders/79/builds/6315/steps/5/logs/stdio" rel="nofollow">https://build.julialang.org/#/builders/79/builds/6315/steps/5/logs/stdio</a></p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="nested task error: Failed - mbedTLS: ctr_drbg_init returned (-0x0034) CTR_DRBG - The entropy source failed while requesting"><pre class="notranslate"><code class="notranslate">nested task error: Failed - mbedTLS: ctr_drbg_init returned (-0x0034) CTR_DRBG - The entropy source failed while requesting
</code></pre></div>
<p dir="auto">Not sure how to expect this to be handled, but saw it on CI:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="Error in testset Downloads:
Error During Test at /Users/julia/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/runtests.jl:184
  Got exception outside of a @test
  TaskFailedException
  
      nested task error: Failed - mbedTLS: ctr_drbg_init returned (-0x0034) CTR_DRBG - The entropy source failed while requesting https://httpbingo.julialang.org/delay/2?id=37
      Stacktrace:
        [1] (::Downloads.var&quot;#9#17&quot;{IOBuffer, Base.DevNull, Nothing, Vector{Pair{String, String}}, Nothing, Bool, Bool, String, Int64, Bool, Bool})(easy::Downloads.Curl.Easy)
          @ Downloads ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:313
        [2] with_handle(f::Downloads.var&quot;#9#17&quot;{IOBuffer, Base.DevNull, Nothing, Vector{Pair{String, String}}, Nothing, Bool, Bool, String, Int64, Bool, Bool}, handle::Downloads.Curl.Easy)
          @ Downloads.Curl ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Curl/Curl.jl:43
        [3] #8
          @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:267 [inlined]
        [4] arg_write(f::Downloads.var&quot;#8#16&quot;{Base.DevNull, Nothing, Vector{Pair{String, String}}, Nothing, Bool, Bool, String, Int64, Bool, Bool}, arg::IOBuffer)
          @ ArgTools ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/ArgTools/src/ArgTools.jl:112
        [5] #7
          @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:266 [inlined]
        [6] arg_read
          @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/ArgTools/src/ArgTools.jl:61 [inlined]
        [7] request(url::String; input::Nothing, output::IOBuffer, method::Nothing, headers::Vector{Pair{String, String}}, progress::Nothing, verbose::Bool, throw::Bool, downloader::Downloads.Downloader)
          @ Downloads ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:265
        [8] #3
          @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:182 [inlined]
        [9] arg_write(f::Downloads.var&quot;#3#4&quot;{Nothing, Vector{Pair{String, String}}, Nothing, Bool, Downloads.Downloader, String}, arg::IOBuffer)
          @ ArgTools ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/ArgTools/src/ArgTools.jl:112
       [10] #download#2
          @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:181 [inlined]
       [11] (::Main.Test99Main_Downloads.var&quot;#2#3&quot;{Base.Iterators.Pairs{Symbol, Downloads.Downloader, Tuple{Symbol}, NamedTuple{(:downloader,), Tuple{Downloads.Downloader}}}, String})(output::IOBuffer)
          @ Main.Test99Main_Downloads ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/setup.jl:12
       [12] sprint(::Function; context::Nothing, sizehint::Int64)
          @ Base ./strings/io.jl:105
       [13] sprint
          @ ./strings/io.jl:101 [inlined]
       [14] #download_body#1
          @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/setup.jl:11 [inlined]
       [15] #download_json#4
          @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/setup.jl:17 [inlined]
       [16] macro expansion
          @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/runtests.jl:197 [inlined]
       [17] (::Main.Test99Main_Downloads.var&quot;#15#29&quot;{Downloads.Downloader, String, Int64})()
          @ Main.Test99Main_Downloads ./task.jl:395
  
  ...and 37 more exceptions.
  
  Stacktrace:
    [1] sync_end(c::Channel{Any})
      @ Base ./task.jl:353
    [2] macro expansion
      @ task.jl:372 [inlined]
    [3] macro expansion
      @ timing.jl:276 [inlined]
    [4] macro expansion
      @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/runtests.jl:195 [inlined]
    [5] macro expansion
      @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Test/src/Test.jl:1144 [inlined]
    [6] macro expansion
      @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/runtests.jl:185 [inlined]
    [7] macro expansion
      @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Test/src/Test.jl:1144 [inlined]
    [8] top-level scope
      @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/runtests.jl:4
    [9] include
      @ ./Base.jl:386 [inlined]
   [10] macro expansion
      @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/test/testdefs.jl:24 [inlined]
   [11] macro expansion
      @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Test/src/Test.jl:1144 [inlined]
   [12] macro expansion
      @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/test/testdefs.jl:23 [inlined]
   [13] macro expansion
      @ ./timing.jl:353 [inlined]
   [14] runtests(name::String, path::String, isolate::Bool; seed::UInt128)
      @ Main ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/test/testdefs.jl:21
   [15] (::Distributed.var&quot;#106#108&quot;{Distributed.CallMsg{:call_fetch}})()
      @ Distributed ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Distributed/src/process_messages.jl:278
   [16] run_work_thunk(thunk::Distributed.var&quot;#106#108&quot;{Distributed.CallMsg{:call_fetch}}, print_error::Bool)
      @ Distributed ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Distributed/src/process_messages.jl:63
   [17] macro expansion
      @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Distributed/src/process_messages.jl:278 [inlined]
   [18] (::Distributed.var&quot;#105#107&quot;{Distributed.CallMsg{:call_fetch}, Distributed.MsgHeader, Sockets.TCPSocket})()
      @ Distributed ./task.jl:395"><pre class="notranslate"><code class="notranslate">Error in testset Downloads:
Error During Test at /Users/julia/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/runtests.jl:184
  Got exception outside of a @test
  TaskFailedException
  
      nested task error: Failed - mbedTLS: ctr_drbg_init returned (-0x0034) CTR_DRBG - The entropy source failed while requesting https://httpbingo.julialang.org/delay/2?id=37
      Stacktrace:
        [1] (::Downloads.var"#9#17"{IOBuffer, Base.DevNull, Nothing, Vector{Pair{String, String}}, Nothing, Bool, Bool, String, Int64, Bool, Bool})(easy::Downloads.Curl.Easy)
          @ Downloads ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:313
        [2] with_handle(f::Downloads.var"#9#17"{IOBuffer, Base.DevNull, Nothing, Vector{Pair{String, String}}, Nothing, Bool, Bool, String, Int64, Bool, Bool}, handle::Downloads.Curl.Easy)
          @ Downloads.Curl ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Curl/Curl.jl:43
        [3] #8
          @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:267 [inlined]
        [4] arg_write(f::Downloads.var"#8#16"{Base.DevNull, Nothing, Vector{Pair{String, String}}, Nothing, Bool, Bool, String, Int64, Bool, Bool}, arg::IOBuffer)
          @ ArgTools ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/ArgTools/src/ArgTools.jl:112
        [5] #7
          @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:266 [inlined]
        [6] arg_read
          @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/ArgTools/src/ArgTools.jl:61 [inlined]
        [7] request(url::String; input::Nothing, output::IOBuffer, method::Nothing, headers::Vector{Pair{String, String}}, progress::Nothing, verbose::Bool, throw::Bool, downloader::Downloads.Downloader)
          @ Downloads ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:265
        [8] #3
          @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:182 [inlined]
        [9] arg_write(f::Downloads.var"#3#4"{Nothing, Vector{Pair{String, String}}, Nothing, Bool, Downloads.Downloader, String}, arg::IOBuffer)
          @ ArgTools ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/ArgTools/src/ArgTools.jl:112
       [10] #download#2
          @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Downloads/src/Downloads.jl:181 [inlined]
       [11] (::Main.Test99Main_Downloads.var"#2#3"{Base.Iterators.Pairs{Symbol, Downloads.Downloader, Tuple{Symbol}, NamedTuple{(:downloader,), Tuple{Downloads.Downloader}}}, String})(output::IOBuffer)
          @ Main.Test99Main_Downloads ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/setup.jl:12
       [12] sprint(::Function; context::Nothing, sizehint::Int64)
          @ Base ./strings/io.jl:105
       [13] sprint
          @ ./strings/io.jl:101 [inlined]
       [14] #download_body#1
          @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/setup.jl:11 [inlined]
       [15] #download_json#4
          @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/setup.jl:17 [inlined]
       [16] macro expansion
          @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/runtests.jl:197 [inlined]
       [17] (::Main.Test99Main_Downloads.var"#15#29"{Downloads.Downloader, String, Int64})()
          @ Main.Test99Main_Downloads ./task.jl:395
  
  ...and 37 more exceptions.
  
  Stacktrace:
    [1] sync_end(c::Channel{Any})
      @ Base ./task.jl:353
    [2] macro expansion
      @ task.jl:372 [inlined]
    [3] macro expansion
      @ timing.jl:276 [inlined]
    [4] macro expansion
      @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/runtests.jl:195 [inlined]
    [5] macro expansion
      @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Test/src/Test.jl:1144 [inlined]
    [6] macro expansion
      @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/runtests.jl:185 [inlined]
    [7] macro expansion
      @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Test/src/Test.jl:1144 [inlined]
    [8] top-level scope
      @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/stdlib/v1.6/Downloads/test/runtests.jl:4
    [9] include
      @ ./Base.jl:386 [inlined]
   [10] macro expansion
      @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/test/testdefs.jl:24 [inlined]
   [11] macro expansion
      @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Test/src/Test.jl:1144 [inlined]
   [12] macro expansion
      @ ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/test/testdefs.jl:23 [inlined]
   [13] macro expansion
      @ ./timing.jl:353 [inlined]
   [14] runtests(name::String, path::String, isolate::Bool; seed::UInt128)
      @ Main ~/buildbot/worker-tabularasa/tester_macos64/build/share/julia/test/testdefs.jl:21
   [15] (::Distributed.var"#106#108"{Distributed.CallMsg{:call_fetch}})()
      @ Distributed ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Distributed/src/process_messages.jl:278
   [16] run_work_thunk(thunk::Distributed.var"#106#108"{Distributed.CallMsg{:call_fetch}}, print_error::Bool)
      @ Distributed ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Distributed/src/process_messages.jl:63
   [17] macro expansion
      @ ~/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.6/Distributed/src/process_messages.jl:278 [inlined]
   [18] (::Distributed.var"#105#107"{Distributed.CallMsg{:call_fetch}, Distributed.MsgHeader, Sockets.TCPSocket})()
      @ Distributed ./task.jl:395
</code></pre></div>
<p dir="auto"><a href="https://build.julialang.org/#/builders/79/builds/5443" rel="nofollow">https://build.julialang.org/#/builders/79/builds/5443</a></p>