diff --git a/arbtt_wayland_toplevel.py b/arbtt_wayland_toplevel.py
index e03d85a..39da2f1 100755
--- a/arbtt_wayland_toplevel.py
+++ b/arbtt_wayland_toplevel.py
@@ -6,6 +6,7 @@ from wl_framework.protocols.base import UnsupportedProtocolError
 from wl_framework.protocols.foreign_toplevel import ForeignTopLevel
 from wl_framework.protocols.data_control import DataControl
 from wl_framework.protocols.idle_notify import ( IdleNotifyManager, IdleNotifier as _IdleNotifier )
+from wl_framework.network.connection import WaylandDisconnected
 import asyncio.subprocess as subprocess
 import orjson
 
@@ -108,7 +109,12 @@ if __name__ == '__main__':
 	import asyncio
 	from wl_framework.loop_integrations import AsyncIOIntegration
 
+	# without this, WaylandDisconnected exceptions are thrown forever and problems occur
+	def handler(loop, context):
+		sys.exit(0)
+
 	async def init():
+		asyncio.get_event_loop().set_exception_handler(handler)
 		arbtt_importer = await subprocess.create_subprocess_exec("arbtt-import", "-a", "-t", "JSON", stdin=subprocess.PIPE)
 		loop = AsyncIOIntegration()
 		try:
@@ -125,4 +131,4 @@ if __name__ == '__main__':
 	try:
 		asyncio.run(init())
 	except KeyboardInterrupt:
-		print()
+		print()
\ No newline at end of file
diff --git a/block_scope.py b/block_scope.py
new file mode 100644
index 0000000..823a2aa
--- /dev/null
+++ b/block_scope.py
@@ -0,0 +1,68 @@
+import ast
+import inspect
+import types
+
+BLOCKS = (
+    ast.If,
+    ast.For, ast.AsyncFor, ast.While,
+    ast.Try,
+    ast.With, ast.AsyncWith,
+    ast.Match
+)
+
+def block_scope(f):
+    _, pos = inspect.getsourcelines(f)
+    source = inspect.getsource(f)
+    source = '\n'.join(source.splitlines()[1:]) # remove the decorator first line.
+
+    old_code_obj = f.__code__
+    old_ast = ast.parse(source)
+
+    def rewrite(node, varstack):
+        if isinstance(node, (ast.Import, ast.ImportFrom)):
+            varstack[-1].update(x.asname or x.name for x in node.names)
+        if isinstance(node, BLOCKS):
+            varstack = varstack + [set()]
+        if isinstance(node, (ast.FunctionDef, ast.AsyncFunctionDef)):
+            varstack[-1].add(node.name)
+            varstack = varstack + [set(arg.arg for arg in node.args.args)]
+        if isinstance(node, (ast.Nonlocal, ast.Global)):
+            varstack[-1].update(node.names)
+        if isinstance(node, ast.Name):
+            if isinstance(node.ctx, ast.Load):
+                if all(node.id not in s for s in varstack):
+                    node.id += "\u200b" * len(varstack)
+            elif isinstance(node.ctx, ast.Store):
+                varstack[-1].add(node.id)
+
+        for child in ast.iter_child_nodes(node):
+            rewrite(child, varstack)
+        return node
+
+    new_ast = rewrite(old_ast, [set(f.__globals__) | set(dir(__builtins__))])
+    ast.increment_lineno(new_ast, pos)
+    new_code_obj = compile(new_ast, old_code_obj.co_filename, "exec")
+    new_f = types.FunctionType(new_code_obj.co_consts[0], f.__globals__)
+    return new_f
+
+@block_scope
+def example(demo1, demo2):
+    import random as rand
+    import random
+    from random import randint
+    if demo1:
+        if random.randint(0, 1) or randint(0, 3) == 3 or rand.randint(0, 5) == 5:
+            x = 3
+        else:
+            x = 4
+        print(x) # error
+    x = 723
+    def test():
+        nonlocal x
+        x = 4
+    if demo2:
+        test()
+    print(x)
+
+print(example)
+example(False, True)
\ No newline at end of file
diff --git a/smtp2rss.py b/smtp2rss.py
index 7652fbe..f77c40b 100644
--- a/smtp2rss.py
+++ b/smtp2rss.py
@@ -12,6 +12,7 @@ import json
 import feedparser.sanitizer
 import rfeed
 import base64
+from lxml.html.clean import Cleaner
 
 def now(): return datetime.now(tz=timezone.utc)
 def decode_mime(subject): return str(make_header(decode_header(subject)))
@@ -80,6 +81,26 @@ preference = {
     "text/plain": 1
 }
 
+def clean_html(html):
+    cleaner = Cleaner(
+        page_structure=True,
+        meta=True,
+        embedded=True,
+        links=True,
+        style=False,
+        processing_instructions=True,
+        inline_style=True,
+        scripts=True,
+        javascript=True,
+        comments=True,
+        frames=True,
+        forms=True,
+        annoying_tags=True,
+        remove_unknown_tags=True,
+        safe_attrs_only=True
+    )
+    return cleaner.clean_html(feedparser.sanitizer._sanitize_html(html.replace("<!doctype html>", ""), "utf-8", "text/html"))
+
 def email_to_html(emsg, debug_info=False):
     if isinstance(emsg, Message):
         payload = emsg.get_payload()
@@ -90,14 +111,17 @@ def email_to_html(emsg, debug_info=False):
             else:
                 html = [ email_to_html(thing, debug_info) for thing in payload ]
         else:
-            try:
-                payload = emsg.get_payload(decode=True).decode("utf-8")
-            except:
-                payload = emsg.get_payload(decode=True).decode("latin1")
-            if emsg.get_content_subtype() == "html":
-                html = div(dominate.util.raw(feedparser.sanitizer._sanitize_html(payload.replace("<!doctype html>", ""), "utf-8", "text/html")))
+            if "attachment" in emsg.get("content-disposition", ""):
+                html = div("[attachment]")
             else:
-                html = pre(payload)
+                try:
+                    payload = emsg.get_payload(decode=True).decode("utf-8")
+                except:
+                    payload = emsg.get_payload(decode=True).decode("latin1")
+                if emsg.get_content_subtype() == "html":
+                    html = div(dominate.util.raw(clean_html(payload)))
+                else:
+                    html = pre(payload)
     else:
         html = [ email_to_html(thing, debug_info) for thing in emsg.get_body(list(preference.keys())) ]
     return div([