[slf4j-dev] [JIRA] (SLF4J-416) Format string parameter substitution not working for single exception argument

[QOS.CH (JIRA)]

Stefan Podkowinski created SLF4J-416:
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             Summary: Format string parameter substitution not working for single exception argument
                 Key: SLF4J-416
                 URL: https://jira.qos.ch/browse/SLF4J-416
             Project: SLF4J
          Issue Type: Bug
          Components: Core API
    Affects Versions: 1.7.25
            Reporter: Stefan Podkowinski
            Assignee: SLF4J developers list


Some logging statements will not work as intended after upgrading to 1.7.25, due to a change in the way exceptions are handled in {{MessageFormatter}}. The following test will illustrate the issue:
 
{code:java}
@Test
public void testExceptionAsParameter() {
  Exception e = new Exception("A terrible mistake");
  result = MessageFormatter.format("Error! {}", e).getMessage();
  assertEquals("Error! A terrible mistake", result);
}
{code}

Result:
{noformat}
org.junit.ComparisonFailure: 
 Expected :Error! A terrible mistake
 Actual :Error! {}
{noformat}


This seems to be a regression of SLF4J-353.





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