`@code_lowered` etc errors when used on broadcasting function call

[daviehh]

With dot-function calls, @code_lowered & friends error when the argument is a variable name. e.g. The dot syntax works when some arguments of a multi-argument function is just a number and not an array, such as for the example here,

f(x,y) = 3x + 4y
A = [1.0, 2.0, 3.0]
f.(pi, A)

where the dot is broadcasting for the 2nd argument of f. For this example:
@code_lowered f.(pi, A) errors with

type Symbol has no field head

Stacktrace:
 [1] getproperty(::Symbol, ::Symbol) at ./Base.jl:33
...

(same with @code_typed and @code_llvm, @code_native).

@code_lowered f.(A,A) also fails

ERROR: LoadError: type Symbol has no field head
Stacktrace:
 [1] getproperty(::Symbol, ::Symbol) at ./Base.jl:33
...

however, @code_lowered f.(rand(3), rand(3)) does not error.

There was #35522 but this issue also occurs on master

julia> versioninfo()
Julia Version 1.6.0-DEV.173
Commit 8c65f8d987* (2020-06-05 00:08 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin19.5.0)
  CPU: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-9.0.1 (ORCJIT, skylake)

[Liozou]

Thanks for the bug report! I don't know how I managed to overlook that, because it seems that the very first example I gave in #35522 is not working either, which is odd.

[Liozou]

So what happened is that I introduced the bug when trying to handle splats (in commit 8b2ce41), so the first example was working when I only had commit 9d5606b but not after adding the second one.
PR #36267 should fix this.