[4.2.2] Compiler crash with null pointer in tsc.js: isWeakType resolved.callSignatures is null #42942

paztis · 2021-02-24T17:07:47Z

Bug Report

🔎 Search Terms

resolved.callSignatures

🕗 Version & Regression Information

This is a crash
This changed between versions 4.1.0 and 4.2.2

⏯ Playground Link

Playground link with relevant code

💻 Code

// We can quickly address your report if:
//  - The code sample is short. Nearly all TypeScript bugs can be demonstrated in 20-30 lines of code!
//  - It doesn't use external libraries. These are often issues with the type definitions rather than TypeScript bugs.
//  - The incorrectness of the behavior is readily apparent from reading the sample.
// Reports are slower to investigate if:
//  - We have to pare too much extraneous code.
//  - We have to clone a large repo and validate that the problem isn't elsewhere.
//  - The sample is confusing or doesn't clearly demonstrate what's wrong.

source code:

function isWeakType(type) {
    if (type.flags & 524288) {
        var resolved = resolveStructuredTypeMembers(type);
        return resolved.callSignatures.length === 0 && resolved.constructSignatures.length === 0 &&
            !resolved.stringIndexInfo && !resolved.numberIndexInfo &&
            resolved.properties.length > 0 &&
            ts.every(resolved.properties, function (p) { return !!(p.flags & 16777216); });
    }
    if (type.flags & 2097152) {
        return ts.every(type.types, isWeakType);
    }
    return false;
}

error log:

TypeError: Cannot read property 'length' of undefined
    at isWeakType (/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/typescript/lib/tsc.js:50733:48)
    at isRelatedTo (/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/typescript/lib/tsc.js:49252:58)
    at checkTypeRelatedTo (/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/typescript/lib/tsc.js:48974:26)
    at isTypeRelatedTo (/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/typescript/lib/tsc.js:48938:24)
    at removeSubtypes (/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/typescript/lib/tsc.js:46041:33)
    at getUnionType (/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/typescript/lib/tsc.js:46131:26)
    at getWidenedTypeForAssignmentDeclaration (/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/typescript/lib/tsc.js:42011:28)
    at getTypeOfFuncClassEnumModuleWorker (/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/typescript/lib/tsc.js:42497:34)
    at getTypeOfFuncClassEnumModule (/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/typescript/lib/tsc.js:42476:51)
    at getTypeOfSymbol (/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/typescript/lib/tsc.js:42579:24)

value of the resolved variable at crash time:

Type {
  flags: 524288,
  id: 5978,
  objectFlags: 16,
  symbol: <ref *1> Symbol {
    flags: 33554960,
    escapedName: '_extends',
    declarations: [ [Node] ],
    valueDeclaration: Node {
      pos: 0,
      end: 479,
      kind: 251,
      id: 5476,
      flags: 131072,
      modifierFlagsCache: 536870912,
      transformFlags: 1052704,
      parent: [Node],
      original: undefined,
      decorators: undefined,
      modifiers: undefined,
      symbol: [Symbol],
      localSymbol: undefined,
      locals: Map(0) {},
      nextContainer: [Node],
      name: [Identifier],
      typeParameters: undefined,
      parameters: [Array],
      type: undefined,
      body: [Node],
      asteriskToken: undefined,
      returnFlowNode: [Object],
      jsDocCache: []
    },
    id: undefined,
    mergeId: undefined,
    parent: undefined,
    checkFlags: 0,
    exports: Map(2) { 'default' => [Symbol], '___esModule' => [Symbol] },
    cjsExportMerged: [Circular *1],
    type: Type {
      flags: 524288,
      id: 5976,
      objectFlags: 16,
      symbol: [Circular *1],
      members: [Map],
      properties: undefined,
      callSignatures: undefined,
      constructSignatures: undefined,
      stringIndexInfo: undefined,
      numberIndexInfo: undefined
    },
    resolvedExports: Map(2) { 'default' => [Symbol], '___esModule' => [Symbol] }
  },
  members: Map(2) {
    'default' => Symbol {
      flags: 2097152,
      escapedName: 'default',
      declarations: [Array],
      valueDeclaration: undefined,
      id: 6422,
      mergeId: undefined,
      parent: [Symbol]
    },
    '___esModule' => Symbol {
      flags: 1048580,
      escapedName: '___esModule',
      declarations: [Array],
      valueDeclaration: [Node],
      id: undefined,
      mergeId: undefined,
      parent: [Symbol]
    }
  },
  properties: [
    Symbol {
      flags: 2097152,
      escapedName: 'default',
      declarations: [Array],
      valueDeclaration: undefined,
      id: 6422,
      mergeId: undefined,
      parent: [Symbol]
    },
    Symbol {
      flags: 1048580,
      escapedName: '___esModule',
      declarations: [Array],
      valueDeclaration: [Node],
      id: undefined,
      mergeId: undefined,
      parent: [Symbol]
    }
  ],
  callSignatures: undefined,
  constructSignatures: undefined,
  stringIndexInfo: undefined,
  numberIndexInfo: undefined
}

value of resolved.symbol.declarations[0]:
seems to came from @babel/runtime (in v7.13.7 on my node_modules)

<ref *1> Node {
  pos: 0,
  end: 479,
  kind: 251,
  id: 5476,
  flags: 131072,
  modifierFlagsCache: 536870912,
  transformFlags: 1052704,
  parent: <ref *2> Node {
    pos: 0,
    end: 586,
    kind: 297,
    id: 5471,
    flags: 131072,
    modifierFlagsCache: 536870912,
    transformFlags: 32,
    parent: undefined,
    original: undefined,
    statements: [
      [Circular *1],
      [Node],
      [Node],
      pos: 0,
      end: 585,
      hasTrailingComma: false,
      transformFlags: 32
    ],
    endOfFileToken: Token {
      pos: 585,
      end: 586,
      kind: 1,
      id: 0,
      flags: 131072,
      transformFlags: 0,
      parent: [Circular *2]
    },
    fileName: '/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/@babel/runtime/helpers/extends/index.js',
    text: 'function _extends() {\n' +
      '  module.exports = _extends = Object.assign || function (target) {\n' +
      '    for (var i = 1; i < arguments.length; i++) {\n' +
      '      var source = arguments[i];\n' +
      '\n' +
      '      for (var key in source) {\n' +
      '        if (Object.prototype.hasOwnProperty.call(source, key)) {\n' +
      '          target[key] = source[key];\n' +
      '        }\n' +
      '      }\n' +
      '    }\n' +
      '\n' +
      '    return target;\n' +
      '  };\n' +
      '\n' +
      '  module.exports["default"] = module.exports, module.exports.__esModule = true;\n' +
      '  return _extends.apply(this, arguments);\n' +
      '}\n' +
      '\n' +
      'module.exports = _extends;\n' +
      'module.exports["default"] = module.exports, module.exports.__esModule = true;\n',
    languageVersion: 99,
    languageVariant: 1,
    scriptKind: 1,
    isDeclarationFile: false,
    hasNoDefaultLib: false,
    externalModuleIndicator: undefined,
    bindDiagnostics: [],
    bindSuggestionDiagnostics: undefined,
    pragmas: Map(0) {},
    checkJsDirective: undefined,
    referencedFiles: [],
    typeReferenceDirectives: [],
    libReferenceDirectives: [],
    amdDependencies: [],
    commentDirectives: undefined,
    nodeCount: 129,
    identifierCount: 48,
    identifiers: Map(17) {
      '_extends' => '_extends',
      'module' => 'module',
      'exports' => 'exports',
      'Object' => 'Object',
      'assign' => 'assign',
      'target' => 'target',
      'i' => 'i',
      'arguments' => 'arguments',
      'length' => 'length',
      'source' => 'source',
      'key' => 'key',
      'prototype' => 'prototype',
      'hasOwnProperty' => 'hasOwnProperty',
      'call' => 'call',
      'default' => 'default',
      '__esModule' => '__esModule',
      'apply' => 'apply'
    },
    parseDiagnostics: [],
    path: '/users/jeromeh/workspaces/experience-core/digitalexp-ui-base/node_modules/@babel/runtime/helpers/extends/index.js',
    resolvedPath: '/users/jeromeh/workspaces/experience-core/digitalexp-ui-base/node_modules/@babel/runtime/helpers/extends/index.js',
    originalFileName: '/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/@babel/runtime/helpers/extends/index.js',
    imports: [],
    moduleAugmentations: [],
    ambientModuleNames: [],
    resolvedModules: undefined,
    additionalSyntacticDiagnostics: [],
    locals: Map(2) { '_extends' => [Symbol], 'module' => [Symbol] },
    nextContainer: [Circular *1],
    commonJsModuleIndicator: Node {
      pos: 21,
      end: 353,
      kind: 216,
      id: 0,
      flags: 131072,
      modifierFlagsCache: 536870912,
      transformFlags: 32,
      parent: [Node],
      original: undefined,
      left: [Node],
      operatorToken: [Token],
      right: [Node],
      symbol: [Symbol]
    },
    symbol: Symbol {
      flags: 512,
      escapedName: '"/Users/jeromeh/Workspaces/experience-core/digitalexp-ui-base/node_modules/@babel/runtime/helpers/extends/index"',
      declarations: [Array],
      valueDeclaration: [Circular *2],
      id: undefined,
      mergeId: undefined,
      parent: undefined,
      exports: [Map]
    },
    symbolCount: 12,
    classifiableNames: Set(2) { 'export=', 'default' },
    jsDocCache: []
  },
  original: undefined,
  decorators: undefined,
  modifiers: undefined,
  symbol: Symbol {
    flags: 16,
    escapedName: '_extends',
    declarations: [ [Circular *1] ],
    valueDeclaration: [Circular *1],
    id: 6415,
    mergeId: 1689,
    parent: undefined,
    isReferenced: 1949695
  },
  localSymbol: undefined,
  locals: Map(0) {},
  nextContainer: <ref *3> Node {
    pos: 68,
    end: 353,
    kind: 208,
    id: 5472,
    flags: 131072,
    modifierFlagsCache: 536875008,
    transformFlags: 1048608,
    parent: Node {
      pos: 51,
      end: 353,
      kind: 216,
      id: 0,
      flags: 131072,
      modifierFlagsCache: 0,
      transformFlags: 32,
      parent: [Node],
      original: undefined,
      left: [Node],
      operatorToken: [Token],
      right: [Circular *3]
    },
    original: undefined,
    decorators: undefined,
    modifiers: undefined,
    symbol: Symbol {
      flags: 16,
      escapedName: '__function',
      declarations: [Array],
      valueDeclaration: [Circular *3],
      id: 6416,
      mergeId: undefined,
      parent: undefined
    },
    localSymbol: undefined,
    locals: Map(4) {
      'target' => [Symbol],
      'i' => [Symbol],
      'source' => [Symbol],
      'key' => [Symbol]
    },
    nextContainer: undefined,
    name: undefined,
    typeParameters: undefined,
    parameters: [
      [Node],
      pos: 79,
      end: 85,
      hasTrailingComma: false,
      transformFlags: 0
    ],
    type: undefined,
    body: Node {
      pos: 86,
      end: 353,
      kind: 230,
      id: 0,
      flags: 131072,
      modifierFlagsCache: 0,
      transformFlags: 1048608,
      parent: [Circular *3],
      original: undefined,
      statements: [Array],
      multiLine: true
    },
    asteriskToken: undefined,
    flowNode: { flags: 6208, antecedent: [Object], node: [Node] },
    returnFlowNode: { flags: 6152, antecedents: [Array], id: 81 },
    jsDocCache: []
  },
  name: Identifier {
    pos: 8,
    end: 17,
    kind: 78,
    id: 0,
    flags: 131072,
    transformFlags: 0,
    parent: [Circular *1],
    original: undefined,
    flowNode: { flags: 6146 },
    originalKeywordKind: undefined,
    escapedText: '_extends'
  },
  typeParameters: undefined,
  parameters: [ pos: 18, end: 18, hasTrailingComma: false, transformFlags: 0 ],
  type: undefined,
  body: Node {
    pos: 19,
    end: 479,
    kind: 230,
    id: 0,
    flags: 131072,
    modifierFlagsCache: 0,
    transformFlags: 1052704,
    parent: [Circular *1],
    original: undefined,
    statements: [
      [Node],
      [Node],
      [Node],
      pos: 21,
      end: 477,
      hasTrailingComma: false,
      transformFlags: 1052704
    ],
    multiLine: true
  },
  asteriskToken: undefined,
  returnFlowNode: {
    flags: 2064,
    antecedent: { flags: 2304, antecedent: [Object], node: [Node] },
    node: Node {
      pos: 401,
      end: 427,
      kind: 201,
      id: 0,
      flags: 131072,
      modifierFlagsCache: 536870912,
      transformFlags: 0,
      parent: [Node],
      original: undefined,
      expression: [Node],
      name: [Identifier],
      symbol: [Symbol],
      flowNode: [Object]
    }
  },
  jsDocCache: []
}

🙁 Actual behavior

Crash

🙂 Expected behavior

Don't crash

The text was updated successfully, but these errors were encountered:

andrewbranch · 2021-02-24T18:00:07Z

@paztis the “source code” section of the bug report is supposed to be the code that makes TypeScript crash, not the TypeScript code that crashes. I might be able to reconstruct something from the debug dumps you provided, but it would be really helpful if you could describe how to trigger this crash.

paztis · 2021-02-24T18:05:24Z

yes I know

I've difficulties to identify the problematic piece of code but just found it.
in @babel/runtime/helpers/extends/index.js (v7.13.7)

function _extends() {
  module.exports = _extends = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  module.exports["default"] = module.exports, module.exports.__esModule = true;
  return _extends.apply(this, arguments);
}

module.exports = _extends;
module.exports["default"] = module.exports, module.exports.__esModule = true;

If I replace it with its mjs version tsc compilation pass
in @babel/runtime/helpers/extends/_index.mjs (v7.13.7)

export default function _extends() {
  _extends = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  return _extends.apply(this, arguments);
}

andrewbranch · 2021-02-24T18:06:25Z

So just compiling that file causes the crash? Or does the crash start with something that imports and uses _extends?

paztis · 2021-02-24T18:09:23Z

Something that import and use it Don't know what Le mer. 24 févr. 2021 à 19:06, Andrew Branch <notifications@github.com> a écrit :

…

So just compiling that file causes the crash? Or does the crash start with something that imports and uses _extends? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#42942 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABIKMMPBQLOJSZYP3GK5EO3TAU53DANCNFSM4YE4L5BA> .

andrewbranch · 2021-02-24T18:11:43Z

Can you at least tell me what your tsconfig is like? Clearly you’re compiling JS with checkJs, right? And I think there must be a maxNodeModulesDepth if this JS file is getting checked?

paztis · 2021-02-24T18:19:18Z

Sorry

Yes I add it:

{
  "compilerOptions": {
    "jsx": "react-jsx"
    "target": "esnext",
    "module": "esnext",
    "moduleResolution": "node",
    // Process & infer types from .js files.
    "allowJs": true,
    "maxNodeModuleJsDepth": 3,
    // Enable strictest settings like strictNullChecks & noImplicitAny.
    "strict": false,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    // "noImplicitThis": true,
    "isolatedModules": false, // Disallow features that require cross-file information for emit.
    "esModuleInterop": true, // Import non-ES modules as default imports.
    "skipLibCheck": true, // Do not validate the dependencies definitions
    "experimentalDecorators": true,
    "suppressImplicitAnyIndexErrors": true,
    // resolution of dependencies/
    "resolveJsonModule": true,
    "baseUrl": "."
  }
}

paztis · 2021-02-24T20:37:52Z

here is a repo where I reproduce the defect
https://codesandbox.io/s/twilight-sound-ll66d?file=/tsconfig.json

Locally, with the same code I've the error, but don't know why not on codeSandbox

just run the command npm run build on it

extra info: node: v14.15.0, system: bigSur

andrewbranch · 2021-02-24T20:58:14Z

Perfect, thank you!

andrewbranch · 2021-02-24T21:15:06Z

Hmm nope, never mind, doesn’t repro for me.

paztis · 2021-02-24T21:31:58Z

you've create this repo locally ?

It contains only 4 files: package.json, tsConfig.json, src/index.ts and src/js/problematicFile.js
Do npm install (or yarn install), then npm run build

andrewbranch · 2021-02-24T21:42:00Z

Yes. I’ve copied it exactly from the codesandbox.

paztis · 2021-02-24T21:57:44Z

on wich OS are you ? I'm on mac
Someone else try to reproduce it and it was working when coming from codeSandbox,
but fails from this zip:

test-module.zip

paztis · 2021-02-24T22:14:51Z

ok I've update the codeSandbox: https://codesandbox.io/s/twilight-sound-ll66d
I was setting index.js instead of index.ts

you can test in now it fails everywhere

nicolo-ribaudo · 2021-02-24T22:22:26Z

I can now reproduce the error.

@andrewbranch If it helps, deleting lines 16 and 21 of https://unpkg.com/browse/@babel/runtime@7.13.7/helpers/extends/index.js from node_modules makes the error disappear.

nicolo-ribaudo · 2021-02-24T22:36:56Z

I managed to create a smaller example:

package.json

{
  "name": "test-module",
  "version": "1.0.0",
  "scripts": {
    "build": "tsc --outDir lib/"
  },
  "dependencies": {
    "typescript": "4.2.2"
  }
}

tsconfig.json

{
  "compilerOptions": {
    "allowJs": true,
    "esModuleInterop": true,
    "noEmit": true,
    "baseUrl": "."
  },
  "include": ["src"]
}

src/index.ts

import dep from "./dep.js";

dep();

src/dep.js

function fn() {}
module.exports = fn;
module.exports = fn;
module.exports["default"] = module.exports;

ts-error-2.zip

paztis · 2021-02-24T22:40:25Z

babel team reject the responsability of their code. they said it is 100% typescript defect

nicolo-ribaudo · 2021-02-24T22:42:39Z

@paztis My example above shows the error without any Babel code 🤷

Btw, I can reproduce this starting from TS 4.1.2

andrewbranch · 2021-02-25T00:48:46Z

Already fixed in #42766.

paztis · 2021-02-25T01:47:50Z

Wait. It has been fixed just after the 4.2.2 publish 13 days ago ?
But it means fix will not be release in 4.2.3 but in 4.3.0 ?

As it is blocking here you're supposed to provide a patch version 4.2.3

paztis · 2021-02-25T13:40:24Z

How can we manage a workaround on this defect today ? I cannot modify babel source code... When is your fix supposed to be released ?

RyanCavanaugh · 2021-02-25T17:10:41Z

@paztis We'll put this into the next 4.2 release (4.2.3 ~~4.3.2~~)

Edit: Disastrously confusing typo; thanks @andrewbranch

paztis · 2021-02-25T17:23:36Z

It is mostly to understand how many time my company will be block on this. Le jeu. 25 févr. 2021 à 18:10, Ryan Cavanaugh <notifications@github.com> a écrit :

…

@paztis <https://github.com/paztis> We'll put this into the next 4.2 release (4.3.2) — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#42942 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABIKMMMUTXJJMNKPE57DWRLTA2ACDANCNFSM4YE4L5BA> .

nicolo-ribaudo · 2021-02-25T17:45:55Z

@paztis as a workaround downgrade @babel/runtime to 7.12, since it contains the file where TS crashes

paztis · 2021-02-25T18:04:33Z

Tu es good idea tks Le jeu. 25 févr. 2021 à 18:46, Nicolò Ribaudo <notifications@github.com> a écrit :

…

@paztis <https://github.com/paztis> as a workaround downgrade @babel/runtime to 7.12, since it contains the file where TS crashes — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#42942 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABIKMMOFVJIDZ37IM2EBADDTA2EGHANCNFSM4YE4L5BA> .

paztis · 2021-03-01T10:38:14Z

Sorry to bother you again
We limit the version of @babel/runtime to ~7.12.0, but lot of other modules are requiring the 7.13.0
We're in a big monolithic repository, and yarn hoist the most used version at root level.
It means we've not full control on it.

So we're in a blocking situation now.
Really not possible to cherry-pick your fix on a 4.2.3 patch ?

I don't see other solutions for now

nicolo-ribaudo · 2021-03-01T10:41:24Z

@paztis You can pin it for your deps adding

"resolutions": {
  "@babel/runtime": "~7.12.0"
}

paztis · 2021-03-01T10:44:09Z

Ok know this one, but I hope it will not cause conflicts with other modules that requires version different from 7 of babel
Because yarn will install then a 7.12 even if they require 6.8

nicolo-ribaudo · 2021-03-01T11:01:56Z

@babel/runtime only exist at version 7; it might cause problems in a few months after the Babel 8 release.

paztis · 2021-03-01T11:03:22Z

ok thanks for all these info
It means next month, Typescript 4.3.2 will be released, so it will be ok

- Pin @babel/runtime per microsoft/TypeScript#42942 Add undeclared workbox dependencies Add sqlite3 unit-testing dependency

andrewbranch · 2021-03-01T21:26:47Z

It’s being released in 4.2.3 #42942 (comment)

RyanCavanaugh added the Bug A bug in TypeScript label Feb 24, 2021

RyanCavanaugh assigned andrewbranch Feb 24, 2021

RyanCavanaugh added this to the TypeScript 4.2.2 milestone Feb 24, 2021

paztis mentioned this issue Feb 24, 2021

bug: Can't resolve '@babel/runtime/helpers/esm/extends [7.13.0 to 7.13.5] babel/babel#12881

Closed

andrewbranch added Needs More Info The issue still hasn't been fully clarified and removed Bug A bug in TypeScript labels Feb 24, 2021

andrewbranch closed this as completed Feb 25, 2021

jayaddison added a commit to openculinary/frontend that referenced this issue Mar 1, 2021

Adjust dependencies

625192b

- Pin @babel/runtime per microsoft/TypeScript#42942 Add undeclared workbox dependencies Add sqlite3 unit-testing dependency

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[4.2.2] Compiler crash with null pointer in tsc.js: isWeakType resolved.callSignatures is null #42942

[4.2.2] Compiler crash with null pointer in tsc.js: isWeakType resolved.callSignatures is null #42942

paztis commented Feb 24, 2021 •

edited

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paztis commented Feb 24, 2021

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andrewbranch commented Feb 24, 2021

paztis commented Feb 24, 2021 •

edited

paztis commented Feb 24, 2021 •

edited

andrewbranch commented Feb 24, 2021

andrewbranch commented Feb 24, 2021

paztis commented Feb 24, 2021

andrewbranch commented Feb 24, 2021

paztis commented Feb 24, 2021

paztis commented Feb 24, 2021

nicolo-ribaudo commented Feb 24, 2021

nicolo-ribaudo commented Feb 24, 2021

paztis commented Feb 24, 2021

nicolo-ribaudo commented Feb 24, 2021 •

edited

andrewbranch commented Feb 25, 2021

paztis commented Feb 25, 2021

paztis commented Feb 25, 2021

RyanCavanaugh commented Feb 25, 2021 •

edited

paztis commented Feb 25, 2021 via email

nicolo-ribaudo commented Feb 25, 2021

paztis commented Feb 25, 2021 via email

paztis commented Mar 1, 2021

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paztis commented Mar 1, 2021

andrewbranch commented Mar 1, 2021

[4.2.2] Compiler crash with null pointer in tsc.js: isWeakType resolved.callSignatures is null #42942

[4.2.2] Compiler crash with null pointer in tsc.js: isWeakType resolved.callSignatures is null #42942

Comments

paztis commented Feb 24, 2021 • edited

Bug Report

🔎 Search Terms

🕗 Version & Regression Information

⏯ Playground Link

💻 Code

🙁 Actual behavior

🙂 Expected behavior

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paztis commented Feb 24, 2021 • edited

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nicolo-ribaudo commented Feb 24, 2021 • edited

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paztis commented Feb 24, 2021 •

edited

paztis commented Feb 24, 2021 •

edited

paztis commented Feb 24, 2021 •

edited

nicolo-ribaudo commented Feb 24, 2021 •

edited

RyanCavanaugh commented Feb 25, 2021 •

edited