Stefan Podkowinski created SLF4J-416: ---------------------------------------- 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. -- This message was sent by Atlassian JIRA (v7.3.1#73012)