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node.d.ts

@@ -497,7 +497,7 @@ declare namespace $ {
     class $mol_error_mix<Cause extends {} = {}> extends AggregateError {
         readonly cause: Cause;
         name: string;
-        constructor(message: string, cause?: Cause, ...errors: Error[]);
+        constructor(message: string, cause?: Cause, ...errors: readonly Error[]);
         static [Symbol.toPrimitive](): string;
         static toString(): string;
         static make(...params: ConstructorParameters<typeof $mol_error_mix>): $mol_error_mix<{}>;

node.mjs

@@ -2054,17 +2054,36 @@ require = (req => Object.assign(function require(name) {
 "use strict";
 var $;
 (function ($) {
+    function cause_serialize(cause) {
+        return JSON.stringify(cause, null, '  ')
+            .replace(/\(/, '<')
+            .replace(/\)/, ' >');
+    }
+    function frame_normalize(frame) {
+        return (typeof frame === 'string' ? frame : cause_serialize(frame))
+            .trim()
+            .replace(/at /gm, '   at ')
+            .replace(/^(?!    +at )(.*)/gm, '    at | $1 (#)');
+    }
     class $mol_error_mix extends AggregateError {
         cause;
         name = $$.$mol_func_name(this.constructor).replace(/^\$/, '') + '_Error';
         constructor(message, cause = {}, ...errors) {
             super(errors, message, { cause });
             this.cause = cause;
-            const stack_get = Object.getOwnPropertyDescriptor(this, 'stack')?.get ?? (() => super.stack);
+            const desc = Object.getOwnPropertyDescriptor(this, 'stack');
+            const stack_get = () => desc?.get?.() ?? super.stack ?? desc?.value ?? this.message;
             Object.defineProperty(this, 'stack', {
-                get: () => (stack_get.call(this) ?? this.message) + '\n' + [JSON.stringify(this.cause, null, '  ') ?? 'no cause', ...this.errors.map(e => e.stack)].map(e => e.trim()
-                    .replace(/at /gm, '   at ')
-                    .replace(/^(?!    +at )(.*)/gm, '    at | $1 (#)')).join('\n')
+                get: () => stack_get() + '\n' + [
+                    this.cause ?? 'no cause',
+                    ...this.errors.flatMap(e => [
+                        e.stack,
+                        ...e instanceof $mol_error_mix || !e.cause ? [] : [e.cause]
+                    ])
+                ].map(frame_normalize).join('\n')
+            });
+            Object.defineProperty(this, 'cause', {
+                get: () => cause
             });
         }
         static [Symbol.toPrimitive]() {