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Fix undefined fromIndex in Array.prototype.lastIndexOf() #568

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Merged
dbatyai merged 1 commit into from
Aug 14, 2015
Merged

Fix undefined fromIndex in Array.prototype.lastIndexOf() #568

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11 changes: 6 additions & 5 deletions jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1862,10 +1862,11 @@ ecma_builtin_array_prototype_object_index_of (ecma_value_t this_arg, /**< this a
*/
static ecma_completion_value_t
ecma_builtin_array_prototype_object_last_index_of (ecma_value_t this_arg, /**< this argument */
ecma_value_t arg1, /**< searchElement */
ecma_value_t arg2) /**< fromIndex */
const ecma_value_t args[], /**< arguments list */
ecma_length_t args_number) /**< number of arguments */
{
ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();
ecma_value_t search_element = (args_number > 0) ? args[0] : ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED);

/* 1. */
ECMA_TRY_CATCH (obj_this,
Expand Down Expand Up @@ -1898,9 +1899,9 @@ ecma_builtin_array_prototype_object_last_index_of (ecma_value_t this_arg, /**< t
uint32_t from_idx = len - 1;

/* 5. */
if (!ecma_is_value_undefined (arg2))
if (args_number > 1)
{
ECMA_OP_TO_NUMBER_TRY_CATCH (arg_from_idx, arg2, ret_value);
ECMA_OP_TO_NUMBER_TRY_CATCH (arg_from_idx, args[1], ret_value);

if (!ecma_number_is_nan (arg_from_idx))
{
Expand Down Expand Up @@ -1972,7 +1973,7 @@ ecma_builtin_array_prototype_object_last_index_of (ecma_value_t this_arg, /**< t
ECMA_TRY_CATCH (get_value, ecma_op_object_get (obj_p, idx_str_p), ret_value);

/* 8.b.ii */
if (ecma_op_strict_equality_compare (arg1, get_value))
if (ecma_op_strict_equality_compare (search_element, get_value))
{
*num_p = ecma_uint32_to_number (from_idx);
}
Expand Down
2 changes: 1 addition & 1 deletion jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.inc.h
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Expand Up @@ -72,7 +72,7 @@ ROUTINE (LIT_MAGIC_STRING_SORT, ecma_builtin_array_prototype_object_sort, 1, 1)
ROUTINE (LIT_MAGIC_STRING_SPLICE, ecma_builtin_array_prototype_object_splice, NON_FIXED, 2)
ROUTINE (LIT_MAGIC_STRING_UNSHIFT, ecma_builtin_array_prototype_object_unshift, NON_FIXED, 1)
ROUTINE (LIT_MAGIC_STRING_INDEX_OF_UL, ecma_builtin_array_prototype_object_index_of, 2, 1)
ROUTINE (LIT_MAGIC_STRING_LAST_INDEX_OF_UL, ecma_builtin_array_prototype_object_last_index_of, 2, 1)
ROUTINE (LIT_MAGIC_STRING_LAST_INDEX_OF_UL, ecma_builtin_array_prototype_object_last_index_of, NON_FIXED, 1)
ROUTINE (LIT_MAGIC_STRING_EVERY, ecma_builtin_array_prototype_object_every, 2, 1)
ROUTINE (LIT_MAGIC_STRING_SOME, ecma_builtin_array_prototype_object_some, 2, 1)
ROUTINE (LIT_MAGIC_STRING_FOR_EACH_UL, ecma_builtin_array_prototype_object_for_each, 2, 1)
Expand Down
4 changes: 4 additions & 0 deletions tests/jerry/array-prototype-lastindexof.js
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Expand Up @@ -41,6 +41,10 @@ var arr = [];
arr[4294967294] = "foo";
assert(arr.lastIndexOf("foo", -1) === 4294967294)

var arr = [1,2];
assert(arr.lastIndexOf(2, undefined) === -1);
assert(arr.lastIndexOf(2) === 1);

// Checking behavior when unable to get length
var obj = { lastIndexOf : Array.prototype.lastIndexOf}
Object.defineProperty(obj, 'length', { 'get' : function () { throw new ReferenceError ("foo"); } });
Expand Down