logging() in .juliarc.jl does not work

[chakravala]

This is an issue related to #16213

The logging function does not have any effect when used from .juliarc.jl

For example, in my case I needed to overwrite the Base.show_delim_array method so I used

logging(DevNull,Base,:show_delim_array;kind=:warn)

as explained on discourse

Using this in the REPL after julia has loaded is no problem, but it does not work from .juliarc.jl and the warnings are still displayed anyway.

[c42f]

logging() is now deprecated by #24490 so this issue is somewhat obsolete.

In theory the new infrastructure allows you to do what you want, but it's immature and there's still various things to fix. Can you show the exact code which triggers the warning which you're trying to silence?

[chakravala]

Here is the code I wanted to silence:

logging(DevNull,Base,:show_delim_array;kind=:warn)
logging(DevNull,Main,:show_delim_array;kind=:warn)
import Base.show_delim_array

function show_delim_array(io::IO, itr::Union{AbstractArray,SimpleVector}, op, delim, cl,
                          delim_one, i1=first(linearindices(itr)), l=last(linearindices(itr)))
    print(io, op)
    if !Base.show_circular(io, itr)
        recur_io = IOContext(io, :SHOWN_SET => itr)
        if !haskey(io, :compact)
            recur_io = IOContext(recur_io, :compact => true)
        end
        first = true
        i = i1
        if l >= i1
            while true
                if !isassigned(itr, i)
                    print(io, undef_ref_str)
                else
                    x = itr[i]
                    show(recur_io, x)
                end
                i += 1
                if i > l
                    delim_one && first && print(io, delim)
                    break
                end
                first = false
                print(io, delim)
            end
        end
    end
    print(io, cl)
end

function show_delim_array(io::IO, itr, op, delim, cl, delim_one, i1=1, n=typemax(Int))
    print(io, op)
    if !Base.show_circular(io, itr)
        recur_io = IOContext(io, :SHOWN_SET => itr)
        state = start(itr)
        first = true
        while i1 > 1 && !done(itr, state)
            _, state = next(itr, state)
            i1 -= 1
        end
        if !done(itr, state)
            while true
                x, state = next(itr, state)
                show(recur_io, x)
                i1 += 1
                if done(itr, state) || i1 > n
                    delim_one && first && print(io, delim)
                    break
                end
                first = false
                print(io, delim)
            end
        end
    end
    print(io, cl)
end

It's to make the display output of Array's back to the way it was before (without spaces).

[c42f]

Thanks - that confirms the associated warning "WARNING: Method definition ... overwritten at ..." is coming from the runtime in gf.c. So this issue isn't sorted out in 0.7 quite yet, but should be as part of the second point listed at #25109