polish #4991

Changes.md

@@ -22,8 +22,7 @@ require "sidekiq/middleware/current_attributes"
 Sidekiq::CurrentAttributes.persist(Myapp::Current) # Your AS:CurrentAttributes singleton
 ```
 - Retry Redis operation if we get an `UNBLOCKED` Redis error. [#4985]
-- **BREAKING CHANGE** Run existing signal-handling code, if there is any, before running sidekiq's
-  signal-handling code. [#4991]
+- Run existing signal traps, if any, before running Sidekiq's trap. [#4991]
 
 6.2.2
 ---------

lib/sidekiq/cli.rb

@@ -50,8 +50,9 @@ module Sidekiq
           if old_handler.respond_to?(:call)
             begin
               old_handler.call
-            rescue Exception
-              puts $!.inspect
+            rescue Exception => exc
+              # signal handlers can't use Logger so puts only
+              puts ["Error in #{sig} handler", exc].inspect
             end
           end
           self_write.puts(sig)