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LibJS: Use element index as key for array spread in object

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This fixes spreading of arrays with holes in object literals where the
inserted keys are not consecutive numbers.

Fixes #3967.
This commit is contained in:
Linus Groh
2020-11-06 22:49:36 +00:00
committed by Andreas Kling
parent 06a3625545
commit 745ffca580
2 changed files with 6 additions and 1 deletions
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2
Libraries/LibJS/AST.cpp
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@@ -1552,7 +1552,7 @@ Value ObjectExpression::execute(Interpreter& interpreter, GlobalObject& global_o
if (key.is_array()) {
auto& array_to_spread = static_cast<Array&>(key.as_object());
for (auto& entry : array_to_spread.indexed_properties()) {
object->indexed_properties().append(entry.value_and_attributes(&array_to_spread).value);
object->indexed_properties().put(object, entry.index(), entry.value_and_attributes(&array_to_spread).value);
if (interpreter.exception())
return {};
}