Do not insert cause into exception if it's the same as exception.

Fixes #4114.
jruby · Sep 30, 2016 · 9fced1e · 9fced1e
1 parent 895e1f4
commit 9fced1e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/core/src/main/java/org/jruby/RubyKernel.java b/core/src/main/java/org/jruby/RubyKernel.java
@@ -865,7 +865,7 @@ public static IRubyObject raise(ThreadContext context, IRubyObject recv, IRubyOb
             printExceptionSummary(context, runtime, raise.getException());
         }
 
-        if (argc > 0 && raise.getException().getCause() == UNDEF) {
+        if (argc > 0 && raise.getException().getCause() == UNDEF && cause != raise.getException()) {
             raise.getException().setCause(cause);
         }