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inspect: print individual AggregateError.errors #43645

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#43646
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inspect: print individual AggregateError.errors#43645
#43646
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errorsIssues and PRs related to JavaScript errors originating in Node.js core.feature requestIssues requesting new Node.js features.inspectorIssues and PRs related to the V8 inspector protocol.

Description

@LiviaMedeiros
LiviaMedeiros
opened on Jul 1, 2022

What is the problem this feature will solve?

> (() => {
throw new AggregateError([
  new TypeError('blep'),
  new RangeError('blop')
], 'gwak');
})();
Uncaught AggregateError: gwak
    at REPL6:2:7

When AggregateError is uncaught or inspected by util.inspect(), its errors property is ignored, so all individual errors are being swallowed. We can't get information about what exactly happened, where it happened, even how many errors there were.

What is the feature you are proposing to solve the problem?

Printing all .errors with their respective stacktraces, either adding it to AggregateError info or replacing it.

What alternatives have you considered?

Abbreviated output, something like AggregateError[ TypeError, TypeError, EvalError ]. This still doesn't provide enough info: each aggregated error is an uncaught exception/rejection, and debug info should provide as much details as possible about them.

Activity

  1. LiviaMedeiros
    added
    feature requestIssues requesting new Node.js features.
    inspectorIssues and PRs related to the V8 inspector protocol.
    errorsIssues and PRs related to JavaScript errors originating in Node.js core.
    on Jul 1, 2022
  2. nodejs-github-bot
    closed this as completedin #43646on Jul 9, 2022
  3. nodejs-github-bot
    added a commit that references this issue on Jul 9, 2022

    util: add `AggregateError.prototype.errors` to inspect output

    653cfff
  4. targos
    added a commit that references this issue on Jul 12, 2022

    util: add `AggregateError.prototype.errors` to inspect output

    5a5c4be
  5. targos
    added a commit that references this issue on Jul 31, 2022

    util: add `AggregateError.prototype.errors` to inspect output

    5edfccf

  6. SimenB commented on Aug 31, 2022

    @SimenB
    SimenB
    on Aug 31, 2022
    Member

    Would it be possible to make this nested/recurse?

    (()=>{throw new AggregateError([new AggregateError([new TypeError('blep'), new RangeError('blop')], 'inner')],'gwak')})()
Uncaught AggregateError: gwak
    at REPL2:1:13 {
  [errors]: [
    AggregateError: inner
        at REPL2:1:33
        at REPL2:1:120
        at Script.runInThisContext (node:vm:129:12)
        at REPLServer.defaultEval (node:repl:572:29)
        at bound (node:domain:433:15)
        at REPLServer.runBound [as eval] (node:domain:444:12)
        at REPLServer.onLine (node:repl:902:10)
        at REPLServer.emit (node:events:525:35)
        at REPLServer.emit (node:domain:489:12)
        at REPLServer.Interface._onLine (node:readline:491:10) {
      [errors]: [Array]
    }
  ]
}

    Notice [errors]: [Array]

  7. LiviaMedeiros commented on Aug 31, 2022

    @LiviaMedeiros
    LiviaMedeiros
    on Aug 31, 2022
    MemberAuthor

    This is recursive, but the depth is limited by default.

    > [[[123]]]
[ [ [ 123 ] ] ]

> [[[[123]]]]
[ [ [ [Array] ] ] ]

    Inspecting explicitly:

    > try {
(()=>{throw new AggregateError([new AggregateError([new TypeError('blep'), new RangeError('blop')], 'inner')],'gwak')})()
} catch(e) { console.log(util.inspect(e)) }

AggregateError: gwak
    at REPL34:1:19
    at REPL34:1:126
    at Script.runInThisContext (node:vm:129:12)
    at REPLServer.defaultEval (node:repl:572:29)
    at bound (node:domain:433:15)
    at REPLServer.runBound [as eval] (node:domain:444:12)
    at REPLServer.onLine (node:repl:902:10)
    at REPLServer.emit (node:events:525:35)
    at REPLServer.emit (node:domain:489:12)
    at [_onLine] [as _onLine] (node:internal/readline/interface:425:12) {
  [errors]: [
    AggregateError: inner
        at REPL34:1:39
        at REPL34:1:126
        at Script.runInThisContext (node:vm:129:12)
        at REPLServer.defaultEval (node:repl:572:29)
        at bound (node:domain:433:15)
        at REPLServer.runBound [as eval] (node:domain:444:12)
        at REPLServer.onLine (node:repl:902:10)
        at REPLServer.emit (node:events:525:35)
        at REPLServer.emit (node:domain:489:12)
        at [_onLine] [as _onLine] (node:internal/readline/interface:425:12) {
      [errors]: [Array]
    }
  ]
}

    Inspecting with depth: 9:

    > try {
(()=>{throw new AggregateError([new AggregateError([new TypeError('blep'), new RangeError('blop')], 'inner')],'gwak')})()
} catch(e) { console.log(util.inspect(e, { depth: 9 })) }

AggregateError: gwak
    at REPL37:1:19
    at REPL37:1:126
    at Script.runInThisContext (node:vm:129:12)
    at REPLServer.defaultEval (node:repl:572:29)
    at bound (node:domain:433:15)
    at REPLServer.runBound [as eval] (node:domain:444:12)
    at REPLServer.onLine (node:repl:902:10)
    at REPLServer.emit (node:events:525:35)
    at REPLServer.emit (node:domain:489:12)
    at [_onLine] [as _onLine] (node:internal/readline/interface:425:12) {
  [errors]: [
    AggregateError: inner
        at REPL37:1:39
        at REPL37:1:126
        at Script.runInThisContext (node:vm:129:12)
        at REPLServer.defaultEval (node:repl:572:29)
        at bound (node:domain:433:15)
        at REPLServer.runBound [as eval] (node:domain:444:12)
        at REPLServer.onLine (node:repl:902:10)
        at REPLServer.emit (node:events:525:35)
        at REPLServer.emit (node:domain:489:12)
        at [_onLine] [as _onLine] (node:internal/readline/interface:425:12) {
      [errors]: [
        TypeError: blep
            at REPL37:1:59
            at REPL37:1:126
            at Script.runInThisContext (node:vm:129:12)
            at REPLServer.defaultEval (node:repl:572:29)
            at bound (node:domain:433:15)
            at REPLServer.runBound [as eval] (node:domain:444:12)
            at REPLServer.onLine (node:repl:902:10)
            at REPLServer.emit (node:events:525:35)
            at REPLServer.emit (node:domain:489:12)
            at [_onLine] [as _onLine] (node:internal/readline/interface:425:12),
        RangeError: blop
            at REPL37:1:82
            at REPL37:1:126
            at Script.runInThisContext (node:vm:129:12)
            at REPLServer.defaultEval (node:repl:572:29)
            at bound (node:domain:433:15)
            at REPLServer.runBound [as eval] (node:domain:444:12)
            at REPLServer.onLine (node:repl:902:10)
            at REPLServer.emit (node:events:525:35)
            at REPLServer.emit (node:domain:489:12)
            at [_onLine] [as _onLine] (node:internal/readline/interface:425:12)
      ]
    }
  ]
}

  8. SimenB commented on Aug 31, 2022

    @SimenB
    SimenB
    on Aug 31, 2022
    Member

    Right, my point was more if it could work by default for console.log etc without the depth argument?

  9. guangwong
    added a commit that references this issue on Oct 10, 2022

    util: add `AggregateError.prototype.errors` to inspect output

    0b126a6
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