I am generating test reports using coverlet. I tried openCover and cobertura as output formats.

Sadly, in both cases an UTF-8 BOM encoded file is created (which I can't control).

This is the resulting log.

 
[Coverage] [-ERROR-] Errors during parsing
[Coverage] [-ERROR-] Parsing of file 'My\Path\coverage.opencover.xml' failed due to an exception:
[Coverage] [-ERROR-] javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,1]
Message: Content ist nicht zulässig in Prolog. (Translation: Content is not allowed in polog)
[Coverage] [-ERROR-] at java.xml/com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(XMLStreamReaderImpl.java:652)
[Coverage] [-ERROR-] at java.xml/com.sun.xml.internal.stream.XMLEventReaderImpl.nextEvent(XMLEventReaderImpl.java:83)
[Coverage] [-ERROR-] at edu.hm.hafner.coverage.parser.OpenCoverParser.parseReport(OpenCoverParser.java:97)
[Coverage] [-ERROR-] [wrapped] edu.hm.hafner.util.SecureXmlParserFactory$ParsingException: Exception occurred during parsing
XMLStreamException: ParseError at [row,col]:[1,1]
Message: Content ist nicht zulässig in Prolog.
javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,1]
Message: Content ist nicht zulässig in Prolog.
at java.xml/com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(XMLStreamReaderImpl.java:652)
at java.xml/com.sun.xml.internal.stream.XMLEventReaderImpl.nextEvent(XMLEventReaderImpl.java:83)
at edu.hm.hafner.coverage.parser.OpenCoverParser.parseReport(OpenCoverParser.java:97)
at edu.hm.hafner.coverage.CoverageParser.parse(CoverageParser.java:80)
 

The file itself looks normal at the beginning:

<?xml version="1.0" encoding="utf-8"?>
<coverage line-rate="0.0204" branch-rate="0.028300000000000002" version="1.9" timestamp="1706036193" lines-covered="359" lines-valid="17587" branches-covered="111" branches-valid="3920">
  <sources>
    <source>C:\my\workspace\</source>
  </sources>
  <packages>