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LibJS: Fallback to undefined if last value in eval() is empty

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For something like eval(""), the VM's 'last value' is an empty value,
which we must not leak.

Fixes #6643.
This commit is contained in:
Linus Groh 2021-04-25 22:52:19 +02:00
parent 2b4c2301a9
commit 7b1ba4bd5c
2 changed files with 2 additions and 1 deletions
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2
Userland/Libraries/LibJS/Runtime/GlobalObject.cpp
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@ -323,7 +323,7 @@ JS_DEFINE_NATIVE_FUNCTION(GlobalObject::eval)
vm.interpreter().execute_statement(global_object, program);
if (vm.exception())
return {};
return vm.last_value();
return vm.last_value().value_or(js_undefined());
}
// 19.2.6.1.1 Encode ( string, unescapedSet )