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LibJS: Don't save rule start positions along with the parser state

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This fixes #4617.
Also fixes the small problem where some save states would be leaked.
This commit is contained in:
AnotherTest 2020-12-29 16:47:39 +03:30 • committed by Andreas Kling
parent 6ffcd53479
commit 8ca0e8325a
2 changed files with 12 additions and 10 deletions
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11
Libraries/LibJS/Parser.cpp
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@ -367,7 +367,6 @@ RefPtr<FunctionExpression> Parser::try_parse_arrow_function_expression(bool expe
ArmedScopeGuard state_rollback_guard = [&] {
m_parser_state.m_var_scopes.take_last();
rule_start.disable();
load_state();
};
@ -434,6 +433,7 @@ RefPtr<FunctionExpression> Parser::try_parse_arrow_function_expression(bool expe
if (!function_body_result.is_null()) {
state_rollback_guard.disarm();
discard_saved_state();
auto body = function_body_result.release_nonnull();
return create_ast_node<FunctionExpression>({ rule_start.position(), position() }, "", move(body), move(parameters), function_length, m_parser_state.m_var_scopes.take_last(), is_strict, true);
}
@ -446,7 +446,6 @@ RefPtr<Statement> Parser::try_parse_labelled_statement()
save_state();
auto rule_start = push_start();
ArmedScopeGuard state_rollback_guard = [&] {
rule_start.disable();
load_state();
};
@ -463,6 +462,7 @@ RefPtr<Statement> Parser::try_parse_labelled_statement()
statement->set_label(identifier);
state_rollback_guard.disarm();
discard_saved_state();
return statement;
}
@ -471,7 +471,6 @@ RefPtr<MetaProperty> Parser::try_parse_new_target_expression()
save_state();
auto rule_start = push_start();
ArmedScopeGuard state_rollback_guard = [&] {
rule_start.disable();
load_state();
};
@ -485,6 +484,7 @@ RefPtr<MetaProperty> Parser::try_parse_new_target_expression()
return {};
state_rollback_guard.disarm();
discard_saved_state();
return create_ast_node<MetaProperty>({ rule_start.position(), position() }, MetaProperty::Type::NewTarget);
}
@ -2041,4 +2041,9 @@ void Parser::load_state()
m_parser_state = m_saved_state.take_last();
}
void Parser::discard_saved_state()
{
m_saved_state.take_last();
}
}