Source build of 1.12.0 on macOS ARM: failure of Pkg repl prompt after 3fc35778cc

[George9000]

After a source build of 3fc3577 and no v1.12 environment in ~/.julia, launching julia and then attempting to enter the Pkg repl prompt generates the following error about a keymap.

Under the same conditions, no error was present in the immediate prior commit, 68fe512

error details

Julia Version 1.12.0-DEV.711
Commit 3fc35778cc (2024-06-11 21:46 UTC)
Platform Info:
  OS: macOS (arm64-apple-darwin23.5.0)
  CPU: 16 × Apple M3 Max
  WORD_SIZE: 64
  LLVM: libLLVM-17.0.6 (ORCJIT, apple-m3)
Threads: 1 default, 0 interactive, 1 GC (on 12 virtual cores)

              _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.12.0-DEV.711 (2024-06-11)
 _/ |\__'_|_|_|\__'_|  |  Commit 3fc35778cc (1 day old master)
|__/                   |

julia> ┌ Error: Error in the keymap
│   exception =
│    SystemError: opening file "/Users/foo/.julia/environments/v1.12/Project.toml": No such file or directory
│    Stacktrace:
│      [1] systemerror(p::String, errno::Int32; extrainfo::Nothing)
│        @ Base ./error.jl:185
│      [2] open(fname::String; lock::Bool, read::Nothing, write::Nothing, create::Nothing, truncate::Nothing, append::Nothing)
│        @ Base ./iostream.jl:298
│      [3] open
│        @ ./iostream.jl:277 [inlined]
│      [4] open(f::Base.var"#472#473"{String}, args::String; kwargs::@Kwargs{})
│        @ Base ./io.jl:408
│      [5] open
│        @ ./io.jl:407 [inlined]
│      [6] read
│        @ ./io.jl:507 [inlined]
│      [7] projname(project_file::String)
│        @ REPL ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/Pkg_beforeload.jl:73
│      [8] Pkg_promptf()
│        @ REPL ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/Pkg_beforeload.jl:100
│      [9] #invokelatest#2
│        @ ./essentials.jl:1033 [inlined]
│     [10] invokelatest
│        @ ./essentials.jl:1030 [inlined]
│     [11] prompt_string
│        @ ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:478 [inlined]
│     [12] write_prompt(terminal::IO, s::Union{AbstractString, Function}, color::Bool)
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:1617
│     [13] write_prompt(terminal::REPL.Terminals.AbstractTerminal, p::REPL.LineEdit.Prompt, color::Bool)
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:1567
│     [14] write_prompt(terminal::REPL.Terminals.AbstractTerminal, s::REPL.LineEdit.PromptState, color::Bool)
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:1561
│     [15] refresh_multi_line(termbuf::REPL.Terminals.TerminalBuffer, terminal::REPL.Terminals.UnixTerminal, buf::IOBuffer, state::REPL.LineEdit.InputAreaState, prompt::Any; indent::Int64, region_active::Bool)
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:526
│     [16] refresh_multi_line
│        @ ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:511 [inlined]
│     [17] #refresh_multi_line#46
│        @ ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:2078 [inlined]
│     [18] refresh_multi_line(termbuf::REPL.Terminals.TerminalBuffer, terminal::REPL.Terminals.UnixTerminal, s::Union{REPL.LineEdit.PrefixSearchState, REPL.LineEdit.PromptState})
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:2075
│     [19] refresh_multi_line(termbuf::REPL.Terminals.TerminalBuffer, s::REPL.LineEdit.ModeState; kw...)
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:508
│     [20] refresh_line(s::Union{REPL.LineEdit.MIState, REPL.LineEdit.ModeState, IOBuffer}, termbuf::REPL.Terminals.AbstractTerminal)
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:1556
│     [21] activate(p::REPL.LineEdit.TextInterface, s::REPL.LineEdit.ModeState, termbuf::REPL.Terminals.AbstractTerminal, term::REPL.Terminals.TextTerminal)
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:2649
│     [22] transition(f::Function, s::REPL.LineEdit.MIState, newmode::Union{Symbol, REPL.LineEdit.TextInterface})
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:2681
│     [23] (::REPL.var"#117#135"{REPL.LineEditREPL, REPL.LineEdit.Prompt})(::REPL.LineEdit.MIState, ::Any, ::Vararg{Any})
│        @ REPL ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/REPL.jl:1264
│     [24] #invokelatest#2
│        @ ./essentials.jl:1033 [inlined]
│     [25] invokelatest
│        @ ./essentials.jl:1030 [inlined]
│     [26] (::REPL.LineEdit.var"#30#31"{REPL.var"#117#135"{REPL.LineEditREPL, REPL.LineEdit.Prompt}, String})(s::Any, p::Any)
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:1704
│     [27] macro expansion
│        @ ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:2849 [inlined]
│     [28] macro expansion
│        @ ./lock.jl:273 [inlined]
│     [29] prompt!(term::REPL.Terminals.TextTerminal, prompt::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:2841
│     [30] run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
│        @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:2743
│     [31] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
│        @ REPL ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/REPL.jl:1493
│     [32] (::REPL.var"#75#81"{REPL.LineEditREPL, REPL.REPLBackendRef})()
│        @ REPL ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/REPL.jl:498
└ @ REPL.LineEdit ~/applications/juliamaster/usr/share/julia/stdlib/v1.12/REPL/src/LineEdit.jl:2851

[DilumAluthge]

@IanButterworth What do you think the right move is here? Should we create the missing Project.toml file if it doesn't exist? Or can we ignore the error without needing to create the file?

[IanButterworth]

We should do whatever Pkg does, which is what it should be doing. I'll take a look