Typescript: Impossible de lire la propriété 'parent' d'undefined dans collectEnclosingScopes
Version TypeScript: 3.4.0-rc
Punaise
En éditant du code dans VS Code, j'ai vu cette erreur. Désolé, aucune étape de dépôt pour le moment
ERR TypeScript Server Error (3.4.0-rc)
Cannot read property 'parent' of undefined
TypeError: Cannot read property 'parent' of undefined
at collectEnclosingScopes (tsserver.js:117195:127)
at getPossibleExtractionsWorker (tsserver.js:117275:30)
at getPossibleExtractions (tsserver.js:117232:26)
at Object.getAvailableActions (tsserver.js:116745:35)
at tsserver.js:111488:128
at getIterator (tsserver.js:625:23)
at Object.next (tsserver.js:620:35)
at Object.arrayFrom (tsserver.js:1253:32)
at Object.getApplicableRefactors (tsserver.js:111487:23)
at Proxy.getApplicableRefactors (tsserver.js:121287:32)
at IOSession.Session.getApplicableRefactors (tsserver.js:130013:53)
at Session.handlers.ts.createMapFromTemplate._a.(anonymous function) (tsserver.js:128853:61)
at tsserver.js:130237:88
at IOSession.Session.executeWithRequestId (tsserver.js:130228:28)
at IOSession.Session.executeCommand (tsserver.js:130237:33)
at IOSession.Session.onMessage (tsserver.js:130259:35)
at Interface.<anonymous> (tsserver.js:131556:27)
at Interface.emit (events.js:182:13)
at Interface._onLine (readline.js:290:10)
at Interface._normalWrite (readline.js:433:12)
at Socket.ondata (readline.js:149:10)
at Socket.emit (events.js:182:13)
at addChunk (_stream_readable.js:279:12)
at readableAddChunk (_stream_readable.js:264:11)
at Socket.Readable.push (_stream_readable.js:219:10)
at Pipe.onread (net.js:636:20): Error: TypeScript Server Error (3.4.0-rc)
Bug
mjbvz
Tous les 3 commentaires
Le seul endroit où cela pourrait se produire dans le code est ici:
while (true) {
current = current.parent;
// A function parameter's initializer is actually in the outer scope, not the function declaration
if (current.kind === SyntaxKind.Parameter) {
// Skip all the way to the outer scope of the function that declared this parameter
current = findAncestor(current, parent => isFunctionLikeDeclaration(parent))!.parent;
}
Je suppose que nous avons trouvé un paramètre dans un JSDoc près du niveau supérieur, puis avons essayé de marcher jusqu'à la fonction englobante decl, mais nous n'en avons pas trouvé un et avons atteint le fond.
findAncestor(...)! est très suspect et ce serait bien de l'interdire ...
RyanCavanaugh
le 26 mars 2019
J'ai eu une erreur similaire:
Version: typescript 3.7.0-dev.20191017
ERROR in ./node_modules/hammerjs/hammer.js
Module build failed (from ./node_modules/ts-loader/index.js):
TypeError: Cannot read property 'parent' of undefined
at getOuterTypeParameters (/<redacted>/node_modules/typescript/lib/typescript.js:39886:29)
at getOuterTypeParametersOfClassOrInterface (/<redacted>/node_modules/typescript/lib/typescript.js:39944:20)
at getDeclaredTypeOfClassOrInterface (/<redacted>/node_modules/typescript/lib/typescript.js:40217:43)
at createAnonymousTypeNode (/<redacted>/node_modules/typescript/lib/typescript.js:36601:59)
at typeToTypeNodeHelper (/<redacted>/node_modules/typescript/lib/typescript.js:36547:28)
at /<redacted>/node_modules/typescript/lib/typescript.js:36336:106
at withContext (/<redacted>/node_modules/typescript/lib/typescript.js:36381:37)
at Object.typeToTypeNode (/<redacted>/node_modules/typescript/lib/typescript.js:36336:28)
at typeToString (/<redacted>/node_modules/typescript/lib/typescript.js:36303:40)
at reportNonexistentProperty (/<redacted>/node_modules/typescript/lib/typescript.js:54143:165)
marcusbuffett
le 23 oct. 2019
J'ai également reçu une erreur similaire:
Versions TypeScript : 3.7.1-rc , 3.7.2 , 3.7.3-insiders.20191123
Aucune erreur ne se produit <=3.6.4
TypeError: Cannot read property 'parent' of undefined
at Object.getDeclarationOfExpando (/<redacted>/node_modules/typescript/lib/tsc.js:8604:19)
at getTypeOfFuncClassEnumModule (/<redacted>/node_modules/typescript/lib/tsc.js:32596:40)
at getTypeOfSymbol (/<redacted>/node_modules/typescript/lib/tsc.js:32702:24)
at getExternalModuleMember (/<redacted>/node_modules/typescript/lib/tsc.js:28512:64)
at getTargetOfExportSpecifier (/<redacted>/node_modules/typescript/lib/tsc.js:28557:17)
at getTargetOfAliasDeclaration (/<redacted>/node_modules/typescript/lib/tsc.js:28600:28)
at resolveAlias (/<redacted>/node_modules/typescript/lib/tsc.js:28633:30)
at resolveSymbol (/<redacted>/node_modules/typescript/lib/tsc.js:28623:67)
at getSymbolIfSameReference (/<redacted>/node_modules/typescript/lib/tsc.js:29170:33)
at /<redacted>/node_modules/typescript/lib/tsc.js:29164:21
morrisallison
le 23 nov. 2019
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Commentaire le plus utile
J'ai également reçu une erreur similaire:
Versions TypeScript :
3.7.1-rc,3.7.2,3.7.3-insiders.20191123Aucune erreur ne se produit
<=3.6.4