Add debug locations to metaclass nodes and typeof

spec/compiler/codegen/debug_spec.cr

@@ -321,4 +321,14 @@ describe "Code gen: debug" do
       end
       CRYSTAL
   end
+
+  it "doesn't fail if class var initializer is followed by metaclass (#15970)" do
+    codegen <<-CRYSTAL, debug: Crystal::Debug::All
+      module Foo
+        @@x = 1
+      end
+
+      Int32
+      CRYSTAL
+  end
 end

src/compiler/crystal/codegen/codegen.cr

@@ -964,6 +964,7 @@ module Crystal
     def visit(node : TypeOf)
       # convert virtual metaclasses to non-virtual ones, because only the
       # non-virtual type IDs are needed
+      set_current_debug_location(node) if @debug.line_numbers?
       @last = type_id(node.type.devirtualize)
       false
     end
@@ -1723,6 +1724,7 @@ module Crystal
         accept replacement
       else
         node_type = node.type
+        set_current_debug_location(node) if @debug.line_numbers?
         # Special case: if the type is a type tuple we need to create a tuple for it
         if node_type.is_a?(TupleInstanceType)
           @last = allocate_tuple(node_type) do |tuple_type, i|
@@ -1736,6 +1738,7 @@ module Crystal
     end
 
     def visit(node : Generic)
+      set_current_debug_location(node) if @debug.line_numbers?
       @last = type_id(node.type)
       false
     end

src/compiler/crystal/semantic/new.cr

@@ -159,7 +159,7 @@ module Crystal
           arg = Splat.new(arg).at(self) if instance_type.splat_index == i
           arg
         end
-        new_generic = Generic.new(Path.new(instance_type.name), generic_type_args)
+        new_generic = Generic.new(Path.new(instance_type.name), generic_type_args).at(self)
         alloc = Call.new(new_generic, "allocate").at(self)
       else
         alloc = Call.new("allocate").at(self)