Regression with .gitkeep in project init. List.init incorrectly didn't have the first argument the allocator. Added .init to priority queue. Created mem thread allocator alias. Correctly handle ident aliases. Allow ident on builtin aliases.

src/compiler/sema_expr.c

@@ -1093,6 +1093,9 @@ static inline bool sema_expr_analyse_identifier(SemaContext *context, Type *to,
 				case DECL_MACRO:
 					message = "Macros from other modules must be prefixed with the module name.";
 					break;
+				case DECL_DEFINE:
+					message = "Aliases from other modules must be prefixed with the module name.";
+					break;
 				default:
 					UNREACHABLE
 			}