LibJS: Fix crash in Lexer on EOF in unterminated template literal

Fixes #4252.
Author: https://github.com/linusg Commit: https://github.com/SerenityOS/serenity/commit/ea08bf58126 Pull-request: https://github.com/SerenityOS/serenity/pull/4254 Issue: https://github.com/SerenityOS/serenity/issues/4252
2025-04-22 12:35:14 +00:00 · 2020-11-29 22:59:06 +00:00 · 2020-11-29 22:59:06 +00:00 · ea08bf5812 · 2024-07-19 01:10:06 +09:00
commit ea08bf5812
parent 8284f87867
1 changed files with 4 additions and 2 deletions
--- a/Libraries/LibJS/Lexer.cpp
+++ b/Libraries/LibJS/Lexer.cpp
@ -451,8 +451,10 @@ Token Lexer::next()
                    consume();
                consume();
            }
-
-            token_type = TokenType::TemplateLiteralString;
+            if (is_eof() && !m_template_states.is_empty())
+                token_type = TokenType::UnterminatedTemplateLiteral;
+            else
+                token_type = TokenType::TemplateLiteralString;
        }
    } else if (is_identifier_start()) {
        // identifier or keyword