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-rw-r--r--actionview/lib/action_view/renderer/streaming_template_renderer.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionview/lib/action_view/renderer/streaming_template_renderer.rb b/actionview/lib/action_view/renderer/streaming_template_renderer.rb
index 276a28ce07..bb9db21e32 100644
--- a/actionview/lib/action_view/renderer/streaming_template_renderer.rb
+++ b/actionview/lib/action_view/renderer/streaming_template_renderer.rb
@@ -33,7 +33,7 @@ module ActionView
logger = ActionView::Base.logger
return unless logger
- message = "\n#{exception.class} (#{exception.message}):\n".dup
+ message = +"\n#{exception.class} (#{exception.message}):\n"
message << exception.annoted_source_code.to_s if exception.respond_to?(:annoted_source_code)
message << " " << exception.backtrace.join("\n ")
logger.fatal("#{message}\n\n")