Open
Description
Version
v19.9.0
Platform
Linux WORKSTATION 5.15.90.1-microsoft-standard-WSL2 #1 SMP Fri Jan 27 02:56:13 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Subsystem
No response
What steps will reproduce the bug?
Run the following snippet:
const [e, c] = (() => {
try {
// Fails because functions can't be cloned
structuredClone(()=>{});
} catch (e) {
// Return the original error and a clone
return [e, structuredClone(e)];
}
})();
console.log({
'e instanceof Error': e instanceof Error,
'e.name': e.name,
'e.message': e.message,
'e.stack': e.stack,
}, {
'c instanceof Error': c instanceof Error,
'c.name': c.name,
'c.message': c.message,
'c.stack': c.stack,
});How often does it reproduce? Is there a required condition?
Always
What is the expected behavior? Why is that the expected behavior?
Since structuredClone is supposed to support errors, the result should not be an empty object. It should be either a copy of the original error, or a copy of the origininal error but with name changed to Error.
What do you see instead?
The cloned DataCloneError cloned as an empty object.
Welcome to Node.js v19.9.0.
Type ".help" for more information.
> const [e, c] = (() => {
... try {
... // Fails because functions can't be cloned
... structuredClone(()=>{});
... } catch (e) {
... // Return the original error and a clone
... return [e, structuredClone(e)];
... }
... })();
undefined
> console.log({
... 'e instanceof Error': e instanceof Error,
... 'e.name': e.name,
... 'e.message': e.message,
... 'e.stack': e.stack,
... }, {
... 'c instanceof Error': c instanceof Error,
... 'c.name': c.name,
... 'c.message': c.message,
... 'c.stack': c.stack,
... });
{
'e instanceof Error': true,
'e.name': 'DataCloneError',
'e.message': '()=>{} could not be cloned.',
'e.stack': 'DataCloneError: ()=>{} could not be cloned.\n' +
' at new DOMException (node:internal/per_context/domexception:53:5)\n' +
' at structuredClone (node:internal/structured_clone:23:17)\n' +
' at REPL9:4:5\n' +
' at REPL9:9:3\n' +
' at Script.runInThisContext (node:vm:128:12)\n' +
' at REPLServer.defaultEval (node:repl:570:29)\n' +
' at bound (node:domain:433:15)\n' +
' at REPLServer.runBound [as eval] (node:domain:444:12)\n' +
' at REPLServer.onLine (node:repl:900:10)\n' +
' at REPLServer.emit (node:events:525:35)'
} {
'c instanceof Error': false,
'c.name': undefined,
'c.message': undefined,
'c.stack': undefined
}
Additional information
This error limits sending back useful error information through MessagePorts
This is the result of running the same snippet in other runtimes.
Deno
Deno 1.35.2
exit using ctrl+d, ctrl+c, or close()
REPL is running with all permissions allowed.
To specify permissions, run `deno repl` with allow flags.
> const [e, c] = (() => {
try {
// Fails because functions can't be cloned
structuredClone(()=>{});
} catch (e) {
// Return the original error and a clone
return [e, structuredClone(e)];
}
})();
console.log({
'e instanceof Error': e instanceof Error,
'e.name': e.name,
'e.message': e.message,
'e.stack': e.stack,
}, {
'c instanceof Error': c instanceof Error,
'c.name': c.name,
'c.message': c.message,
'c.stack': c.stack,
});
{
"e instanceof Error": true,
"e.name": "DataCloneError",
"e.message": "()=>{} could not be cloned.",
"e.stack": "DOMException: ()=>{} could not be cloned.\n" +
" at new DOMException (ext:deno_web/01_dom_exception.js:"... 288 more characters
} {
"c instanceof Error": false,
"c.name": undefined,
"c.message": undefined,
"c.stack": undefined
}
undefined
Microsoft Edge
const [e, c] = (() => {
try {
// Fails because functions can't be cloned
structuredClone(()=>{});
} catch (e) {
// Return the original error and a clone
return [e, structuredClone(e)];
}
})();
console.log({
'e instanceof Error': e instanceof Error,
'e.name': e.name,
'e.message': e.message,
'e.stack': e.stack,
}, {
'c instanceof Error': c instanceof Error,
'c.name': c.name,
'c.message': c.message,
'c.stack': c.stack,
});
{
"e instanceof Error": true,
"e.name": "DataCloneError",
"e.message": "Failed to execute 'structuredClone' on 'Window': ()=>{} could not be cloned.",
"e.stack": "Error: Failed to execute 'structuredClone' on 'Window': ()=>{} could not be cloned.\n at <anonymous>:4:5\n at <anonymous>:9:3"
}
{
"c instanceof Error": true,
"c.name": "DataCloneError",
"c.message": "Failed to execute 'structuredClone' on 'Window': ()=>{} could not be cloned."
}
Mozilla Firefox
const [e, c] = (() => {
try {
// Fails because functions can't be cloned
structuredClone(()=>{});
} catch (e) {
// Return the original error and a clone
return [e, structuredClone(e)];
}
})();
console.log({
'e instanceof Error': e instanceof Error,
'e.name': e.name,
'e.message': e.message,
'e.stack': e.stack,
}, {
'c instanceof Error': c instanceof Error,
'c.name': c.name,
'c.message': c.message,
'c.stack': c.stack,
});
{
"e instanceof Error": true,
"e.name": "DataCloneError",
"e.message": "The object could not be cloned.",
"e.stack": "@debugger eval code:4:20\n@debugger eval code:9:3\n"
}
{
"c instanceof Error": true,
"c.name": "DataCloneError",
"c.message": "The object could not be cloned.",
"c.stack": ""
}
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