#[diag(metadata_global_alloc_required)]
pub struct GlobalAllocRequired;
-#[derive(Diagnostic)]
-#[diag(metadata_alloc_func_required)]
-pub struct AllocFuncRequired;
-
-#[derive(Diagnostic)]
-#[diag(metadata_missing_alloc_error_handler)]
-pub struct MissingAllocErrorHandler;
-
#[derive(Diagnostic)]
#[diag(metadata_no_transitive_needs_dep)]
pub struct NoTransitiveNeedsDep<'a> {