diff --git a/lib/mako/__init__.py b/lib/mako/__init__.py
index d022cf82..5811e68c 100644
--- a/lib/mako/__init__.py
+++ b/lib/mako/__init__.py
@@ -5,4 +5,4 @@
 # the MIT License: http://www.opensource.org/licenses/mit-license.php
 
 
-__version__ = "1.3.2"
+__version__ = "1.3.3"
diff --git a/lib/mako/codegen.py b/lib/mako/codegen.py
index ce6f83aa..b9fea937 100644
--- a/lib/mako/codegen.py
+++ b/lib/mako/codegen.py
@@ -838,13 +838,24 @@ class _GenerateRenderMethod:
                 text = node.text
             self.printer.writeline(text)
             children = node.get_children()
-            # this covers the three situations where we want to insert a pass:
-            #    1) a ternary control line with no children,
-            #    2) a primary control line with nothing but its own ternary
-            #          and end control lines, and
-            #    3) any control line with no content other than comments
-            if not children or (
-                all(
+
+            # this covers the four situations where we want to insert a pass:
+            # 1) a ternary control line with no children,
+            # 2) a primary control line with nothing but its own ternary
+            #       and end control lines, and
+            # 3) any control line with no content other than comments
+            # 4) the first control block with no content other than comments
+            def _search_for_control_line():
+                for c in children:
+                    if isinstance(c, parsetree.Comment):
+                        continue
+                    elif isinstance(c, parsetree.ControlLine):
+                        return True
+                    return False
+
+            if (
+                not children
+                or all(
                     isinstance(c, (parsetree.Comment, parsetree.ControlLine))
                     for c in children
                 )
@@ -853,6 +864,7 @@ class _GenerateRenderMethod:
                     for c in children
                     if isinstance(c, parsetree.ControlLine)
                 )
+                or _search_for_control_line()
             ):
                 self.printer.writeline("pass")
 
diff --git a/lib/mako/pyparser.py b/lib/mako/pyparser.py
index 9b63dc33..b25ef6e4 100644
--- a/lib/mako/pyparser.py
+++ b/lib/mako/pyparser.py
@@ -90,6 +90,26 @@ class FindIdentifiers(_ast_util.NodeVisitor):
         self._add_declared(node.name)
         self._visit_function(node, False)
 
+    def visit_ListComp(self, node):
+        if self.in_function:
+            if not isinstance(node.elt, _ast.Name):
+                self.visit(node.elt)
+            for comp in node.generators:
+                self.visit(comp.iter)
+        else:
+            self.generic_visit(node)
+
+    visit_SetComp = visit_GeneratorExp = visit_ListComp
+
+    def visit_DictComp(self, node):
+        if self.in_function:
+            if not isinstance(node.key, _ast.Name):
+                self.visit(node.elt)
+            for comp in node.generators:
+                self.visit(comp.iter)
+        else:
+            self.generic_visit(node)
+
     def _expand_tuples(self, args):
         for arg in args:
             if isinstance(arg, _ast.Tuple):
diff --git a/requirements.txt b/requirements.txt
index af94378a..8d9ca973 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ importlib-metadata==7.1.0
 importlib-resources==6.4.0
 git+https://github.com/Tautulli/ipwhois.git@master#egg=ipwhois
 IPy==1.01
-Mako==1.3.2
+Mako==1.3.3
 MarkupSafe==2.1.5
 musicbrainzngs==0.7.1
 packaging==24.0