fix two Core.Box and test that package is empty of such boxes

src/commands.jl

@@ -204,8 +204,9 @@ function until_line!(interp::Interpreter, frame::Frame, line::Union{Nothing, Int
     pc = frame.pc
     initialline, initialfile = linenumber(frame, pc), getfile(frame, pc)
     line === nothing && (line = initialline + 1)
+    line_final = line
     pc = next_until!(interp, frame, istoplevel) do frame::Frame
-        return is_return(pc_expr(frame)) || (linenumber(frame) >= line && getfile(frame) == initialfile)
+        return is_return(pc_expr(frame)) || (linenumber(frame) >= line_final && getfile(frame) == initialfile)
     end
     (pc === nothing || isa(pc, BreakpointRef)) && return pc
     maybe_step_through_kwprep!(interp, frame, istoplevel)

src/types.jl

@@ -171,6 +171,21 @@ else
     is_breakpoint_marker(stmt) = stmt === __BREAK_POINT_MARKER__
 end
 
+@static if VERSION ≥ v"1.12.0-DEV.173"
+function pushuniquefiles!(unique_files::Set{Symbol}, lt)
+    for edge in lt.edges
+        pushuniquefiles!(unique_files, edge)
+    end
+    linetable = lt.linetable
+    if linetable === nothing
+        push!(unique_files, Base.IRShow.debuginfo_file1(lt))
+    else
+        pushuniquefiles!(unique_files, linetable)
+    end
+    return unique_files
+end
+end
+
 function FrameCode(scope, src::CodeInfo; generator=false, optimize=true)
     if optimize
         src, methodtables = optimize!(copy(src), scope)
@@ -196,17 +211,6 @@ function FrameCode(scope, src::CodeInfo; generator=false, optimize=true)
     lt = linetable(src)
     unique_files = Set{Symbol}()
     @static if VERSION ≥ v"1.12.0-DEV.173"
-    function pushuniquefiles!(unique_files::Set{Symbol}, lt)
-        for edge in lt.edges
-            pushuniquefiles!(unique_files, edge)
-        end
-        linetable = lt.linetable
-        if linetable === nothing
-            push!(unique_files, Base.IRShow.debuginfo_file1(lt))
-        else
-            pushuniquefiles!(unique_files, linetable)
-        end
-    end
     pushuniquefiles!(unique_files, lt)
     else # VERSION < v"1.12.0-DEV.173"
     for entry in lt

test/runtests.jl

@@ -4,6 +4,10 @@ using Logging
 
 @test isempty(detect_ambiguities(JuliaInterpreter, Base, Core))
 
+if isdefined(Test, :detect_closure_boxes)
+    @test isempty(Test.detect_closure_boxes(JuliaInterpreter))
+end
+
 if !JuliaInterpreter.isdefinedglobal(@__MODULE__, :read_and_parse)
     include("utils.jl")
 end