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-rw-r--r--actionpack/lib/action_dispatch/middleware/debug_exceptions.rb4
1 files changed, 2 insertions, 2 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
index 61e7e73a68..7669767ae3 100644
--- a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
@@ -183,9 +183,9 @@ module ActionDispatch
message = []
message << " "
message << "#{exception.class} (#{exception.message}):"
- message += exception.annoted_source_code if exception.respond_to?(:annoted_source_code)
+ message.concat(exception.annoted_source_code) if exception.respond_to?(:annoted_source_code)
message << " "
- message += trace
+ message.concat(trace)
log_array(logger, message)
end