Failed LOG.debug() with MultiPart

[joakime]

Jetty version(s)
12

Jetty Environment
Any

Java version/vendor (use: java -version)
Any

OS type/version
Any

Description
When Logging is set to DEBUG during testing of jetty-server's MultiPart behaviors a few exception show up that indicate a problem logging at DEBUG level due to exceptions during .toString()

SLF4J: Failed toString() invocation on an object of type [org.eclipse.jetty.http.MultiPart$ChunksPart]
Reported exception:
java.lang.NullPointerException: Cannot invoke "org.eclipse.jetty.io.Content$Source.getLength()" because the return value of "org.eclipse.jetty.http.MultiPart$Part.getContentSource()" is null
	at org.eclipse.jetty.http@12.0.6-SNAPSHOT/org.eclipse.jetty.http.MultiPart$Part.getLength(MultiPart.java:229)
	at org.eclipse.jetty.http@12.0.6-SNAPSHOT/org.eclipse.jetty.http.MultiPart$ChunksPart.toString(MultiPart.java:448)
	at org.slf4j@2.0.9/org.slf4j.helpers.MessageFormatter.safeObjectAppend(MessageFormatter.java:291)
	at org.slf4j@2.0.9/org.slf4j.helpers.MessageFormatter.deeplyAppendParameter(MessageFormatter.java:263)
	at org.slf4j@2.0.9/org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:225)
	at org.slf4j@2.0.9/org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:160)
	at org.eclipse.jetty.logging@12.0.6-SNAPSHOT/org.eclipse.jetty.logging.StdErrAppender.format(StdErrAppender.java:162)
	at org.eclipse.jetty.logging@12.0.6-SNAPSHOT/org.eclipse.jetty.logging.StdErrAppender.emit(StdErrAppender.java:93)
	at org.eclipse.jetty.logging@12.0.6-SNAPSHOT/org.eclipse.jetty.logging.JettyLogger.emit(JettyLogger.java:631)
	at org.eclipse.jetty.logging@12.0.6-SNAPSHOT/org.eclipse.jetty.logging.JettyLogger.debug(JettyLogger.java:172)
	at org.eclipse.jetty.http@12.0.6-SNAPSHOT/org.eclipse.jetty.http.MultiPart$Part.fail(MultiPart.java:339)
	at org.eclipse.jetty.http@12.0.6-SNAPSHOT/org.eclipse.jetty.http.MultiPart$ChunksPart.fail(MultiPart.java:437)
	at org.eclipse.jetty.http@12.0.6-SNAPSHOT/org.eclipse.jetty.http.MultiPart$Part.close(MultiPart.java:316)
	at org.eclipse.jetty.util@12.0.6-SNAPSHOT/org.eclipse.jetty.util.IO.close(IO.java:444)
	at org.eclipse.jetty.util@12.0.6-SNAPSHOT/org.eclipse.jetty.util.IO.close(IO.java:459)
	at org.eclipse.jetty.http@12.0.6-SNAPSHOT/org.eclipse.jetty.http.MultiPartFormData$Parts.close(MultiPartFormData.java:166)
	at org.eclipse.jetty.server@12.0.6-SNAPSHOT/org.eclipse.jetty.server.handler.MultiPartFormDataHandlerTest.testAsyncMultiPartResponse(MultiPartFormDataHandlerTest.java:264)
2024-01-16 21:54:44.881:DEBUG:oejh.MultiPart:ForkJoinPool-1-worker-4: Error closing part [FAILED toString()]
java.lang.NullPointerException: Cannot invoke "org.eclipse.jetty.io.Content$Source.fail(java.lang.Throwable)" because the return value of "org.eclipse.jetty.http.MultiPart$Part.getContentSource()" is null
	at org.eclipse.jetty.http@12.0.6-SNAPSHOT/org.eclipse.jetty.http.MultiPart$Part.fail(MultiPart.java:323)
	at org.eclipse.jetty.http@12.0.6-SNAPSHOT/org.eclipse.jetty.http.MultiPart$ChunksPart.fail(MultiPart.java:437)
	at org.eclipse.jetty.http@12.0.6-SNAPSHOT/org.eclipse.jetty.http.MultiPart$Part.close(MultiPart.java:316)
	at org.eclipse.jetty.util@12.0.6-SNAPSHOT/org.eclipse.jetty.util.IO.close(IO.java:444)
	at org.eclipse.jetty.util@12.0.6-SNAPSHOT/org.eclipse.jetty.util.IO.close(IO.java:459)
	at org.eclipse.jetty.http@12.0.6-SNAPSHOT/org.eclipse.jetty.http.MultiPartFormData$Parts.close(MultiPartFormData.java:166)
	at org.eclipse.jetty.server@12.0.6-SNAPSHOT/org.eclipse.jetty.server.handler.MultiPartFormDataHandlerTest.testAsyncMultiPartResponse(MultiPartFormDataHandlerTest.java:264)