Wrong error report with Base.@kwdef

[AIxer]

It seems like if you have an error in struct definition with Base.@kwdef, you can always get a error report which indicate that the error take place in util.jl, like:
the source code in TestKwdef.jl:

module TestKwdef

export Foo

Base.@kwdef mutable struct Foo
    a::Int = 1
    b::Int = c  # error!  line: 7 in my editor
end

end # module

but the error report:

julia> foo = Foo()
ERROR: UndefVarError: c not defined
Stacktrace:
 [1] Foo()
   @ TestKwdef .\util.jl:450
 [2] top-level scope
   @ REPL[4]:1

here's versioninfo:

julia> versioninfo()
Julia Version 1.6.2
Commit 1b93d53fc4 (2021-07-14 15:36 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: AMD Ryzen 7 4800H with Radeon Graphics
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-11.0.1 (ORCJIT, znver2)
Environment:
  JULIA_PKG_SERVER = https://mirrors.sjtug.sjtu.edu.cn/julia

[Seelengrab]

Can reproduce on

julia> versioninfo()
Julia Version 1.8.0-DEV.798
Commit 3ae25059fb (2021-10-22 06:13 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-12.0.1 (ORCJIT, skylake)

From @macroexpand:

julia> @macroexpand Base.@kwdef mutable struct Foo2
           a::Int = 1
           b::Int = c
       end
quote
    #= util.jl:500 =#
    begin
        $(Expr(:meta, :doc))
        mutable struct Foo2
            #= REPL[5]:2 =#
            a::Int
            #= REPL[5]:3 =#
            b::Int
        end
    end
    #= util.jl:501 =#
    Foo2(; a = 1, b = c) = begin
            #= util.jl:478 =#
            Foo2(a, b)
        end
end

Seems like there are linenodes from the macro in there - should they be the same as inside the struct?