fix and bump

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [0.8.2] - 2022-12-28
+
+### Fixed
+
+- Fixed issue with TextLog.clear() https://github.com/Textualize/textual/issues/1447
+
 ## [0.8.1] - 2022-12-25
 
 ### Fixed

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "textual"
-version = "0.8.1"
+version = "0.8.2"
 homepage = "https://github.com/Textualize/textual"
 description = "Modern Text User Interface framework"
 authors = ["Will McGugan <will@textualize.io>"]

src/textual/widgets/_text_log.py

@@ -131,7 +131,8 @@ class TextLog(ScrollView, can_focus=True):
 
     def clear(self) -> None:
         """Clear the text log."""
-        del self.lines[:]
+        self.lines.clear()
+        self._line_cache.clear()
         self._start_line = 0
         self.max_width = 0
         self.virtual_size = Size(self.max_width, len(self.lines))