Github user kinow commented on the issue: https://github.com/apache/commons-lang/pull/334 I'm fine either way (I believe even some classes in the JDK have some [unchecked exceptions](http://hg.openjdk.java.net/jdk7/jdk7/jdk/file/9b8c96f96a0f/src/share/classes/java/util/LinkedList.java) declared?) But I suspect this change is not backward compatible. Can't locate that documentation from Oracle explaining what's a backward change or not, but quite sure this one is.
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