Fix uninitialized variable error

src/compiler/build_tables/build_lex_table.cc

@@ -85,6 +85,7 @@ class LexTableBuilder {
     LexItemSet item_set = build_lex_item_set(parse_table->symbols);
     add_accept_token_actions(item_set, LexTable::ERROR_STATE_ID);
     add_advance_actions(item_set, LexTable::ERROR_STATE_ID);
+    add_token_start(item_set, LexTable::ERROR_STATE_ID);
   }
 
   void add_advance_actions(const LexItemSet &item_set, LexStateId state_id) {

src/compiler/lex_table.cc

@@ -56,6 +56,8 @@ std::ostream &operator<<(std::ostream &stream, const LexAction &action) {
   }
 }
 
+LexState::LexState() : is_token_start(false) {}
+
 set<CharacterSet> LexState::expected_inputs() const {
   set<CharacterSet> result;
   for (auto &pair : actions)

src/compiler/lex_table.h

@@ -54,6 +54,7 @@ namespace tree_sitter {
 
 class LexState {
  public:
+  LexState();
   std::map<rules::CharacterSet, LexAction> actions;
   LexAction default_action;
   std::set<rules::CharacterSet> expected_inputs() const;