Update for JuliaInterpreter's own SSAValue/SlotNumber

Author: timholy

src/LoweredCodeUtils.jl

@@ -1,8 +1,9 @@
 module LoweredCodeUtils
 
-using Core: SimpleVector, CodeInfo, SSAValue
+using Core: SimpleVector, CodeInfo
 using Base.Meta: isexpr
 using JuliaInterpreter
+using JuliaInterpreter: SSAValue, SlotNumber
 using JuliaInterpreter: @lookup, moduleof, pc_expr, step_expr!, is_global_ref, whichtt,
                         next_until!, finish_and_return!, nstatements, codelocation
 
@@ -464,7 +465,7 @@ function bodymethod(mkw::Method)
         if isa(stmt, Expr)
             if stmt.head == :call
                 a = stmt.args[argno]
-                if isa(a, Core.SlotNumber)
+                if isa(a, SlotNumber)
                     if slotnames[a.id] == Symbol("#self#")
                         return true
                     end