Using Alt-J, Alt-O usually opens the REPL in VS-Code. This morning, it generates the below error, which was hard to capture because it disappears a fraction of a second after appearing.
If I open a Julia REPL at the command line I get the same error. The text pasted below is the complete output from a Windows CMD session.
Something seems to have gotten corrupted. I’ve been away for a few days and haven’t personally changed anything - but I suppose Windows update or something else may have updated while I was away.
Any help, much appreciated!
Microsoft Windows [Version 10.0.26100.3775]
(c) Microsoft Corporation. All rights reserved.
C:\Users\tim>julia
_
_ _ _(_)_ | Documentation: https://docs.julialang.org
(_) | (_) (_) |
_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 1.11.5 (2025-04-14)
_/ |\__'_|_|_|\__'_| | Official https://julialang.org/ release
|__/ |
Unhandled Task ERROR: UndefRefError: access to undefined reference
Stacktrace:
[1] getproperty
@ .\Base.jl:49 [inlined]
[2] backend
@ C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:997 [inlined]
[3] (::REPL.var"#70#71"{REPL.LineEditREPL, Pair{Any, Bool}, Bool, Bool})(io::Any)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:405
[4] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:678
[5] print_response
@ C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:403 [inlined]
[6] setup_interface(repl::REPL.LineEditREPL, hascolor::Bool, extra_repl_keymap::Any)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1222
[7] setup_interface
@ C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1090 [inlined]
[8] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1500
[9] (::REPL.var"#79#85"{REPL.LineEditREPL, REPL.REPLBackendRef})()
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:497
caused by: SystemError: opening file "C:\\Users\\tim\\.julia\\logs\\repl_history.jl": Permission denied
Stacktrace:
[1] systemerror(p::String, errno::Int32; extrainfo::Nothing)
@ Base .\error.jl:176
[2] systemerror
@ .\error.jl:176
[3] systemerror
@ .\error.jl:175 [inlined]
[4] open(fname::String; lock::Bool, read::Bool, write::Bool, create::Bool, truncate::Nothing, append::Nothing)
@ Base .\iostream.jl:295
[5] open
@ .\iostream.jl:277 [inlined]
[6] hist_open_file
@ C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:712 [inlined]
[7] setup_interface(repl::REPL.LineEditREPL, hascolor::Bool, extra_repl_keymap::Any)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1215
[8] setup_interface
@ C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1090 [inlined]
[9] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1500
[10] (::REPL.var"#79#85"{REPL.LineEditREPL, REPL.REPLBackendRef})()
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:497
ERROR: TaskFailedException
Stacktrace:
[1] try_yieldto(undo::typeof(Base.ensure_rescheduled))
@ Base .\task.jl:958
[2] wait()
@ Base .\task.jl:1022
[3] wait(c::Base.GenericCondition{ReentrantLock}; first::Bool)
@ Base .\condition.jl:130
[4] wait
@ .\condition.jl:125 [inlined]
[5] take_buffered(c::Channel{Any})
@ Base .\channels.jl:493
[6] take!
@ .\channels.jl:487 [inlined]
[7] repl_backend_loop(backend::REPL.REPLBackend, get_module::Function)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:353
[8] start_repl_backend(backend::REPL.REPLBackend, consumer::Any; get_module::Function)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:343
[9] run_repl(repl::REPL.AbstractREPL, consumer::Any; backend_on_current_task::Bool, backend::Any)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:500
[10] run_repl(repl::REPL.AbstractREPL, consumer::Any)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:486
[11] (::Base.var"#1150#1152"{Bool, Symbol, Bool})(REPL::Module)
@ Base .\client.jl:446
[12] #invokelatest#2
@ .\essentials.jl:1055 [inlined]
[13] invokelatest
@ .\essentials.jl:1052 [inlined]
[14] run_main_repl(interactive::Bool, quiet::Bool, banner::Symbol, history_file::Bool, color_set::Bool)
@ Base .\client.jl:430
[15] repl_main
@ .\client.jl:567 [inlined]
[16] _start()
@ Base .\client.jl:541
nested task error: UndefRefError: access to undefined reference
Stacktrace:
[1] getproperty
@ .\Base.jl:49 [inlined]
[2] backend
@ C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:997 [inlined]
[3] (::REPL.var"#70#71"{REPL.LineEditREPL, Pair{Any, Bool}, Bool, Bool})(io::Any)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:405
[4] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:678
[5] print_response
@ C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:403 [inlined]
[6] setup_interface(repl::REPL.LineEditREPL, hascolor::Bool, extra_repl_keymap::Any)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1222
[7] setup_interface
@ C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1090 [inlined]
[8] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1500
[9] (::REPL.var"#79#85"{REPL.LineEditREPL, REPL.REPLBackendRef})()
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:497
caused by: SystemError: opening file "C:\\Users\\tim\\.julia\\logs\\repl_history.jl": Permission denied
Stacktrace:
[1] systemerror(p::String, errno::Int32; extrainfo::Nothing)
@ Base .\error.jl:176
[2] systemerror
@ .\error.jl:176
[3] systemerror
@ .\error.jl:175 [inlined]
[4] open(fname::String; lock::Bool, read::Bool, write::Bool, create::Bool, truncate::Nothing, append::Nothing)
@ Base .\iostream.jl:295
[5] open
@ .\iostream.jl:277 [inlined]
[6] hist_open_file
@ C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:712 [inlined]
[7] setup_interface(repl::REPL.LineEditREPL, hascolor::Bool, extra_repl_keymap::Any)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1215
[8] setup_interface
@ C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1090 [inlined]
[9] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:1500
[10] (::REPL.var"#79#85"{REPL.LineEditREPL, REPL.REPLBackendRef})()
@ REPL C:\Users\tim\.julia\juliaup\julia-1.11.5+0.x64.w64.mingw32\share\julia\stdlib\v1.11\REPL\src\REPL.jl:497
C:\Users\tim>