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

[QOS.CH (JIRA)]

    [ https://jira.qos.ch/browse/SLF4J-416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18805#comment-18805 ] 

Nikolay Fedorovskikh commented on SLF4J-416:
--------------------------------------------

Duplicate: LOGBACK-1183 , LOGBACK-1302

[https://github.com/qos-ch/slf4j/pull/166|https://github.com/qos-ch/slf4j/pull/166]

> 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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