[logback-dev] [JIRA] Created: (LBCLASSIC-107) thrown from toString exception swallowed

[Anton Lebedevich (JIRA)]

thrown from toString exception swallowed
----------------------------------------

                 Key: LBCLASSIC-107
                 URL: http://jira.qos.ch/browse/LBCLASSIC-107
             Project: logback-classic
          Issue Type: Bug
    Affects Versions: 0.9.15
         Environment: java version "1.6.0_12"
Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
Java HotSpot(TM) Client VM (build 11.2-b01, mixed mode, sharing)
slf4j-api:1.5.6
            Reporter: Anton Lebedevich
            Assignee: Logback dev list


package loggerbug;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Loggerbug 
{
	private static final Logger logger = LoggerFactory.getLogger(Loggerbug.class);
	
	static class ThrowsToString {
		@Override
		public String toString() {
			throw new RuntimeException("from toString");
		}
	}
	
    public static void main(String[] args)
    {
		ThrowsToString probe = new ThrowsToString();
		logger.info("probe is {}", probe);
		System.out.println("no exception");
	}
}

prints "no exception" with logback-classic, but with slf4j-simple output is:

Exception in thread "main" java.lang.RuntimeException: from toString
	at loggerbug.Loggerbug$ThrowsToString.toString(Loggerbug.java:13)
	at java.lang.String.valueOf(String.java:2827)
	at java.lang.StringBuffer.append(StringBuffer.java:219)
	at org.slf4j.helpers.MessageFormatter.deeplyAppendParameter(MessageFormatter.java:237)
	at org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:196)
	at org.slf4j.helpers.MessageFormatter.format(MessageFormatter.java:138)
	at org.slf4j.impl.SimpleLogger.formatAndLog(SimpleLogger.java:222)
	at org.slf4j.impl.SimpleLogger.info(SimpleLogger.java:258)
	at loggerbug.Loggerbug.main(Loggerbug.java:20)

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