Jupyter notebook freezes after typing "round"...

mjherold commented 4 years ago

The Jupiter notebook running the IJulia kernel seems to freeze up when I execute the following after a fresh start:

x = rand(4)
round.(x, digits=3)

function myround(x; kwargs...)
    round(x; kwargs...)
end

myround(3.223, digits=3)

using Polynomials
myround.(x, digits=3)

The moment I finish typing "round" in the next cell, the notebook seems to freeze up. I am not sure if this is a problem with IJulia or a conflict produced by Polynomials.js. If I wrap "round" in a function then the problem is avoided.

Thank you in advance for any help!

Michael test_round.txt

Julia Version 1.4.1
Commit 381693d3df* (2020-04-14 17:20 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin18.7.0)
  CPU: Intel(R) Core(TM) i5-8279U CPU @ 2.40GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-8.0.1 (ORCJIT, skylake)
Environment:
  JULIA_CMDSTAN_HOME = /Users/mj847/Documents/Stan

status output:

Status `~/.julia/environments/v1.4/Project.toml`
  [c52e3926] Atom v0.12.10
  [35d6a980] ColorSchemes v3.7.0
  [5ae59095] Colors v0.12.0
  [f65535da] Convex v0.13.3
  [31c24e10] Distributions v0.22.6
  [2fe49d83] Expectations v1.1.1
  [f6369f11] ForwardDiff v0.10.10
  [60bf3e95] GLPK v0.12.1
  [7073ff75] IJulia v1.21.2
  [c601a237] Interact v0.10.3
  [a98d9a8b] Interpolations v0.12.9
  [b6b21f68] Ipopt v0.6.1
  [42fd0dbc] IterativeSolvers v0.8.4
  [4076af6c] JuMP v0.21.2
  [e5e0dc1b] Juno v0.8.1
  [ba0b0d4f] Krylov v0.5.1
  [5c8ed15e] LinearOperators v1.1.0
  [2fda8390] LsqFit v0.10.0
  [6f286f6a] MultivariateStats v0.7.0
  [429524aa] Optim v0.20.1
  [3b7a836e] PGFPlots v3.2.1
  [91a5bcdd] Plots v1.0.11
  [f27b6e38] Polynomials v0.7.0
  [140ffc9f] ProximalAlgorithms v0.3.1
  [a725b495] ProximalOperators v0.10.3
  [c946c3f1] SCS v0.6.6
  [928aab9d] SpecialMatrices v1.0.0 #master (https://github.com/JuliaMatrices/SpecialMatrices.jl.git)
  [682df890] Stan v6.0.3
  [c1514b29] StanSample v2.1.2
  [2913bbd2] StatsBase v0.32.2
  [29a6e085] Wavelets v0.9.0
  [0f1e0344] WebIO v0.8.13 #master (https://github.com/JuliaGizmos/WebIO.jl)

twavv commented 4 years ago

The moment I finish typing "round" in the next cell, the notebook seems to freeze up. I am not sure if this is a problem with IJulia or a conflict produced by Polynomials.js. If I wrap "round" in a function then the problem is avoided.

Do you mean that the notebook window freezes up? If you open the browser task manager (in Chrome, through the top-right dropdown menu, then More Tools > Task Manager), do you see the tab using 100% of CPU?

If so this might be a CodeMirror bug (I recently discovered a bug where numbers with leading zeros lead to infinite loops in the syntax highlighting process).

stevengj commented 4 years ago

See also #907, #887, which are both codemirror bugs about leading zeros.

stevengj commented 4 years ago

JuliaLang / IJulia.jl

Jupyter notebook freezes after typing "round"... #917