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LibJS: Make FunctionObject's m_home_object an Object*, not Value

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As the name implies (and the spec confirms), this is only ever going to
be an object or "nothing", or "undefined" in the spec. By taking this
literally and updating a check to check for `is_undefined()`, we
introduced a bug - the value was still initialized as an empty value.
Instead, use a pointer to an Object - either we have one, or we don't.

Fixes #8448.
This commit is contained in:
Linus Groh 2021-07-05 12:57:17 +01:00
parent 83f3f396ad
commit fe9dc47320
2 changed files with 6 additions and 6 deletions
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6
Userland/Libraries/LibJS/Runtime/FunctionEnvironment.cpp
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@ -33,9 +33,9 @@ Value FunctionEnvironment::get_super_base() const
{
VERIFY(m_function_object);
auto home_object = m_function_object->home_object();
if (home_object.is_undefined())
if (!home_object)
return js_undefined();
return home_object.as_object().internal_get_prototype_of();
return home_object->internal_get_prototype_of();
}
// 9.1.1.3.2 HasThisBinding ( ), https://tc39.es/ecma262/#sec-function-environment-records-hasthisbinding
@ -51,7 +51,7 @@ bool FunctionEnvironment::has_super_binding() const
{
if (this_binding_status() == ThisBindingStatus::Lexical)
return false;
if (function_object().home_object().is_undefined())
if (!function_object().home_object())
return false;
return true;
}