diff --git a/gcc/rust/checks/errors/rust-ast-validation.cc b/gcc/rust/checks/errors/rust-ast-validation.cc index 673290959f4..4142cc6317e 100644 --- a/gcc/rust/checks/errors/rust-ast-validation.cc +++ b/gcc/rust/checks/errors/rust-ast-validation.cc @@ -93,6 +93,11 @@ ASTValidation::visit (AST::Function &function) function.get_self_param ()->get_locus (), "%<self%> parameter is only allowed in associated functions"); + if (function.is_variadic ()) + rust_error_at ( + function.get_function_params ().back ()->get_locus (), + "only foreign or %<unsafe extern \"C\"%> functions may be C-variadic"); + AST::ContextualASTVisitor::visit (function); }