Tweak

doc/filters/merge.rst

@@ -1,9 +1,9 @@
 ``merge``
 =========
 
-The ``merge`` filter merges sequences and mappings.
+The ``merge`` filter merges sequences and mappings:
 
-The ``merge`` filter also works on sequences:
+For sequences, new values are added at the end of the existing ones:
 
 .. code-block:: twig
 
@@ -13,9 +13,9 @@ The ``merge`` filter also works on sequences:
 
     {# values now contains [1, 2, 'apple', 'orange'] #}
 
-New values are added at the end of the existing ones.
-
-The ``merge`` filter also works on mappings:
+For mappings, the merging process occurs on the keys; if the key does not
+already exist, it is added but if the key already exists, its value is
+overridden:
 
 .. code-block:: twig
 
@@ -25,10 +25,6 @@ The ``merge`` filter also works on mappings:
 
     {# items now contains {'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'car', 'renault': 'car'} #}
 
-For mappings, the merging process occurs on the keys: if the key does not
-already exist, it is added but if the key already exists, its value is
-overridden.
-
 .. tip::
 
     If you want to ensure that some values are defined in a mapping (by given

tests/Fixtures/functions/cycle_empty_mapping.test

@@ -0,0 +1,8 @@
+--TEST--
+"cycle" function returns an error on empty mappings
+--TEMPLATE--
+{{ cycle({}, 0) }}
+--DATA--
+return []
+--EXCEPTION--
+Twig\Error\RuntimeError: The "cycle" function does not work on empty sequences/mappings in "index.twig" at line 2.

tests/Fixtures/functions/cycle_empty_sequence.test

@@ -0,0 +1,8 @@
+--TEST--
+"cycle" function returns an error on empty sequences
+--TEMPLATE--
+{{ cycle([], 0) }}
+--DATA--
+return []
+--EXCEPTION--
+Twig\Error\RuntimeError: The "cycle" function does not work on empty sequences/mappings in "index.twig" at line 2.

tests/Fixtures/regression/strings_like_numbers.test

@@ -1,8 +1,8 @@
 --TEST--
 Twig does not confuse strings with integers in getAttribute()
 --TEMPLATE--
-{{ hash['2e2'] }}
+{{ mapping['2e2'] }}
 --DATA--
-return ['hash' => ['2e2' => 'works']]
+return ['mapping' => ['2e2' => 'works']]
 --EXPECT--
 works