feat: add auto-recovery for corrupted tags cache

aider/repomap.py

@@ -167,11 +167,39 @@ class RepoMap:
             return fname
 
     def tags_cache_error(self):
-        """Handle SQLite errors by falling back to dict-based cache"""
+        """Handle SQLite errors by trying to recreate cache, falling back to dict if needed"""
-        if isinstance(self.TAGS_CACHE, Cache):
+        if not isinstance(self.TAGS_CACHE, Cache):
-            path = Path(self.root) / self.TAGS_CACHE_DIR
+            return
-            self.io.tool_warning(f"Unable to use tags cache, delete {path} to resolve.")
+
-            self.TAGS_CACHE = dict()
+        path = Path(self.root) / self.TAGS_CACHE_DIR
+        
+        # Try to recreate the cache
+        try:
+            # Delete existing cache dir
+            if path.exists():
+                import shutil
+                shutil.rmtree(path)
+            
+            # Try to create new cache
+            new_cache = Cache(path)
+            
+            # Test that it works
+            test_key = "test"
+            new_cache[test_key] = "test"
+            _ = new_cache[test_key]
+            del new_cache[test_key]
+            
+            # If we got here, the new cache works
+            self.TAGS_CACHE = new_cache
+            return
+            
+        except (SQLITE_ERRORS, OSError) as e:
+            # If anything goes wrong, warn and fall back to dict
+            self.io.tool_warning(f"Unable to use tags cache at {path}, falling back to memory cache")
+            if self.verbose:
+                self.io.tool_warning(f"Cache error: {str(e)}")
+            
+        self.TAGS_CACHE = dict()
 
     def load_tags_cache(self):
         path = Path(self.root) / self.TAGS_CACHE_DIR