Be more conservative about invalidating

src/file_scanner_analyzer/unused_symbols.rs

@@ -27,8 +27,22 @@ pub(crate) fn find_unused_definitions(
  // don’t show unused definitions if we have any invalid Hack files
  if analysis_result.has_invalid_hack_files {
  for file_path in &analysis_result.changed_during_analysis_files {
- file_system.file_hashes_and_times.remove(file_path);
- codebase.files.remove(file_path);
+ if let Some(file_system_info) = file_system.file_hashes_and_times.get_mut(file_path) {
+ // reset the file info so the AST gets recomputed
+ *file_system_info = (0, 0);
+ }
+
+ if let Some(file_info) = codebase.files.get_mut(file_path) {
+ for node in file_info.ast_nodes.iter_mut() {
+ if node.children.is_empty() {
+ node.body_hash = None;
+ } else {
+ for node_child in node.children.iter_mut() {
+ node_child.body_hash = None;
+ }
+ }
+ }
+ }
  }
  return;
  }