Fix issue.

src/v3x/CustomErrorListener.cpp

@@ -23,15 +23,23 @@ void CustomErrorListener::syntaxError(
     const std::string &msg, std::exception_ptr /* e */) {
 
     // ANTLR provides a zero-based character position in line
-    // We change it here to a one-based index, which is the more human-readable, and the common option in text editors
-    auto token_size = offendingSymbol
+    // We change it here to a one-based index, which is the more human-readable,
+    // and the common option in text editors
+    auto start_column{ charPositionInLine + 1 };
+
+    // Special case for EOF token
+    // EOF token has a "<EOF>" text, so we avoid calculating the size of EOF from its text
+    // Instead, we just return a zero size
+    auto token_size = (offendingSymbol && offendingSymbol->getType() != antlr4::Token::EOF)
         ? offendingSymbol->getText().size()
         : 0;
+    auto end_column = start_column + token_size;
+
     throw error::ParseError{
         msg,
         file_name_,
-        { { static_cast<std::uint32_t>(line), static_cast<std::uint32_t>(charPositionInLine + 1) },
-          { static_cast<std::uint32_t>(line), static_cast<std::uint32_t>(charPositionInLine + 1 + token_size) } }
+        { { static_cast<std::uint32_t>(line), static_cast<std::uint32_t>(start_column) },
+          { static_cast<std::uint32_t>(line), static_cast<std::uint32_t>(end_column) } }
     };
 }