`if @generated` functions missing source file and line number information

[nsajko]

The file and line of source code are recorded as none:0:

julia> methods(Base.Math.var"#s706#1")
# 1 method for generic function "#s706#1" from Base.Math:
 [1] var"#s706#1"(::Any, x, p)
     @ none:0

julia> methods(Base.Math.var"#s706#2")
# 1 method for generic function "#s706#2" from Base.Math:
 [1] var"#s706#2"(::Any, z, p)
     @ none:0

julia> versioninfo()
Julia Version 1.13.0-DEV.139
Commit f5ce2497208 (2025-02-28 07:25 UTC)
Build Info:
  Official https://julialang.org release
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 8 × AMD Ryzen 3 5300U with Radeon Graphics
  WORD_SIZE: 64
  LLVM: libLLVM-19.1.7 (ORCJIT, znver2)
  GC: Built with stock GC
Threads: 1 default, 1 interactive, 1 GC (on 8 virtual cores)
Environment:
  JULIA_NUM_PRECOMPILE_TASKS = 4
  JULIA_PKG_PRECOMPILE_AUTO = 0

The functions seem to be originate here:

julia/base/math.jl

Lines 95 to 101 in b0323ab

	if @generated
	N = length(p.parameters::Core.SimpleVector)
	ex = :(p[end])
	for i in N-1:-1:1
	ex = :(muladd(x, $ex, p[$i]))
	end
	ex

julia/base/math.jl

Lines 120 to 139 in b0323ab

	if @generated
	N = length(p.parameters)
	a = :(p[end])
	b = :(p[end-1])
	as = []
	for i in N-2:-1:1
	ai = Symbol("a", i)
	push!(as, :($ai = $a))
	a = :(muladd(r, $ai, $b))
	b = :(muladd(-s, $ai, p[$i]))
	end
	ai = :a0
	push!(as, :($ai = $a))
	C = Expr(:block,
	:(x = real(z)),
	:(y = imag(z)),
	:(r = x + x),
	:(s = muladd(x, x, y*y)),
	as...,
	:(muladd($ai, z, $b)))