Expected error is raised only after second (identical) attempt

[oliviercailloux]

The following code throws only after second call to parse, instead of throwing upon first call as expected.

private static final class ThrowingErrorHandler implements ErrorHandler {
  @Override
  public void warning(SAXParseException exception) throws SAXParseException {
    LOGGER.info("Warning while processing.", exception);
    throw exception;
  }

  @Override
  public void fatalError(SAXParseException exception) throws SAXParseException {
    LOGGER.info("Fatal while processing.", exception);
    throw exception;
  }

  @Override
  public void error(SAXParseException exception) throws SAXParseException {
    LOGGER.info("Error while processing.", exception);
    throw exception;
  }
}

@Test
public void testHtmlIso() throws Exception {
  String uri = "https://github.com/oliviercailloux/JARiS/raw/refs/heads/main/src/test/resources/io/github/oliviercailloux/jaris/xml/Html/Encoding%20ISO.html";
  HtmlDocumentBuilder builder = new HtmlDocumentBuilder();
  builder.setErrorHandler(new ThrowingErrorHandler());
  // logs no warning, does not throw
  builder.parse(uri);
  builder.setErrorHandler(new ThrowingErrorHandler());
  // logs a warning then throws
  builder.parse(uri);
}

Explanation

The document is supposed to raise a warning when parsed, and given the registered ThrowingErrorHandler, it is supposed to log then throw an exception when parsing. But the first parse completes without logging or throwing anything. Only the second one does.