What does the REPL keybinding ctrl + < + t correspond to?

Because of a weird keyboard layout, I often end up pressing ctrl + < + t instead of ctrl + shift + t, and I obtain the following output:

julia> <┌ Error: Error in the keymap
│   exception =
│    EOFError: read end of file
│    Stacktrace:
│      [1] read
│        @ ./iobuffer.jl:217 [inlined]
│      [2] read(io::IOBuffer, #unused#::Type{Char})
│        @ Base ./io.jl:752
│      [3] edit_transpose_chars(buf::IOBuffer)
│        @ REPL.LineEdit ~/packages/julias/julia-1.7/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:1087
│      [4] edit_transpose_chars(s::REPL.LineEdit.MIState)
│        @ REPL.LineEdit ~/packages/julias/julia-1.7/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:1079
│      [5] (::REPL.LineEdit.var"#160#213")(::REPL.LineEdit.MIState, ::Any, ::Vararg{Any})
│        @ REPL.LineEdit ~/packages/julias/julia-1.7/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:2319
│      [6] #invokelatest#2
│        @ ./essentials.jl:716 [inlined]
│      [7] invokelatest
│        @ ./essentials.jl:714 [inlined]
│      [8] (::REPL.LineEdit.var"#25#26"{REPL.LineEdit.var"#160#213", String})(s::Any, p::Any)
│        @ REPL.LineEdit ~/packages/julias/julia-1.7/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:1466
│      [9] prompt!(term::REPL.Terminals.TextTerminal, prompt::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
│        @ REPL.LineEdit ~/packages/julias/julia-1.7/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:2586
│     [10] run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
│        @ REPL.LineEdit ~/packages/julias/julia-1.7/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:2488
│     [11] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
│        @ REPL ~/packages/julias/julia-1.7/share/julia/stdlib/v1.7/REPL/src/REPL.jl:1232
│     [12] (::REPL.var"#49#54"{REPL.LineEditREPL, REPL.REPLBackendRef})()
│        @ REPL ./task.jl:423
└ @ REPL.LineEdit /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.7/REPL/src/LineEdit.jl:2588

What’s going on here exactly?

ctrl + t is a character “transpose”, i.e. abba. The error seems like a bug so you can open an issue with reproduction instructions.

Thanks, I’ve filed an issue.