Macro hygiene broken for interpolation into quoted expressions

[simeonschaub]

MWE:

julia> macro foo()
           quote
               x = 1
               :($x)
           end
       end
@foo (macro with 1 method)

julia> @macroexpand @foo
quote
    #= REPL[40]:3 =#
    var"#58#x" = 1
    #= REPL[40]:4 =#
    x
end

[vtjnash]

This was intentional at the time (7ec9b18#diff-c4aa3af56687ca52d73d3de5e0734726R494-R495), but I definitely didn't realize how little it would break to fix it