Type error within struct reported without actual error line

[paulmelis]

Reduction from a larger struct in which I was specifying the type of the nb field incorrectly:

melis@juggle 23:28:~$ cat t.jl
struct S
    field1::Bool
    field2::String
    # Error is here
    nb::Matrix{UInt8, UInt8}
end
melis@juggle 23:28:~$ julia t.jl
ERROR: LoadError: too many parameters for type
Stacktrace:
 [1] top-level scope at /home/melis/t.jl:1
in expression starting at /home/melis/t.jl:1

The error line reported is the start of the struct definition, which is only of limited value. As I'm a julia beginner I don't immediately spot these errors within the struct and need to check for the offending line by commenting several fields and rerunning. Would it be possible to report the actual line involved? This is especially useful when structs start to contain many fields.

julia> versioninfo()
Julia Version 1.5.2
Commit 539f3ce943* (2020-09-23 23:17 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i5-4460  CPU @ 3.20GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-10.0.1 (ORCJIT, haswell)

[vtjnash]

The error message is improved now, but lowering still fails to report the correct line number, even though that information was present in the parsed file and so it should be capable of preserving it.

julia> struct S
           field1::Bool
           field2::String
           # Error is here
           nb::Matrix{UInt8, UInt8}
       end
ERROR: too many parameters for type Array
Stacktrace:
 [1] top-level scope
   @ REPL[1]:1