Revert "Do not dup the binds when visiting the AST"

This reverts commit 71ff7d9c6592b93e2c810a1f464943dd7bd02c7f.

Reason: I need to check with @jeremy if we can do this.

2 files changed, 3 insertions, 2 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
index ce63b5b4df..32244b1755 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
@@ -9,6 +9,7 @@ module ActiveRecord
       # Converts an arel AST to SQL
       def to_sql(arel, binds = [])
         if arel.respond_to?(:ast)
+          binds = binds.dup
           visitor.accept(arel.ast) do
             quote(*binds.shift.reverse)
           end
@@ -376,7 +377,7 @@ module ActiveRecord
         def sql_for_insert(sql, pk, id_value, sequence_name, binds)
           [sql, binds]
         end
-
+  
         def last_inserted_id(result)
           row = result.rows.first
           row && row.first
diff --git a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
index e790f731ea..92796c996e 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
@@ -229,7 +229,7 @@ module ActiveRecord
 
       alias exec_without_stmt exec_query
 
-      # Returns an ActiveRecord::Result instance.
+      # Returns an ActiveRecord::Result instance. 
       def select(sql, name = nil, binds = [])
         exec_query(sql, name)
       end