1 files changed, 3 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/deprecation/behaviors.rb b/activesupport/lib/active_support/deprecation/behaviors.rb
index 28d2d78643..dc24e2d0e1 100644
--- a/activesupport/lib/active_support/deprecation/behaviors.rb
+++ b/activesupport/lib/active_support/deprecation/behaviors.rb
@@ -1,6 +1,8 @@
 require "active_support/notifications"
 
 module ActiveSupport
+  # Raised when <tt>ActiveSupport::Deprecation::Behavior#behavior</tt> is set with <tt>:raise</tt>.
+  # You would set <tt>:raise</tt>, as a behaviour to raise errors and proactively report exceptions from deprecations.
   class DeprecationException < StandardError
   end
 
@@ -9,7 +11,7 @@ module ActiveSupport
     DEFAULT_BEHAVIORS = {
       raise: ->(message, callstack) {
         e = DeprecationException.new(message)
-        e.set_backtrace(callstack)
+        e.set_backtrace(callstack.map(&:to_s))
         raise e
       },