getting the panic: runtime error: invalid memory address or nil pointer dereference

[shmdhussain]

Steps to reproduce

When running tsgo with the individual apps in large monrepo with proj references,

for most of the apps, able to run successfully, except only for the two apps where the no of ts errors are more than 1000.

version:

"@typescript/native-preview": "^7.0.0-dev.20251014.1",

Behavior with typescript@5.8

the same apps are successfully run with tsc like npx tsc -p client/apps/connector/tsconfig.json, getting the ts checker properly working.

Behavior with tsgo

input with tsgo

npx tsgo -p client/apps/connector/tsconfig.json

Output with tsgo

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x4 pc=0x101028988]

goroutine 55412 [running]:
github.com/microsoft/typescript-go/internal/checker.(*Checker).getTypeOfSymbol(0x140234f5b88?, 0x1016d39e0?)
        github.com/microsoft/typescript-go/internal/checker/checker.go:15884 +0x18
github.com/microsoft/typescript-go/internal/checker.(*Checker).invocationErrorRecovery(0x140234f5308, 0x14034f83440, 0x0, 0x14035e27320)
        github.com/microsoft/typescript-go/internal/checker/checker.go:9759 +0x94
github.com/microsoft/typescript-go/internal/checker.(*Checker).invocationError(0x140234f5308, 0x14034f83440?, 0x14034f83440, 0x0, 0x0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:9748 +0xec
github.com/microsoft/typescript-go/internal/checker.(*Checker).resolveCallExpression(0x140234f5308, 0x14001290268, 0x0, 0x0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:8290 +0x3f4
github.com/microsoft/typescript-go/internal/checker.(*Checker).resolveSignature(0x140234f5a68?, 0x1016d3e60?, 0x14001290268?, 0xffd40c?)
        github.com/microsoft/typescript-go/internal/checker/checker.go:8197 +0x58
github.com/microsoft/typescript-go/internal/checker.(*Checker).getResolvedSignature(0x140234f5308, 0x14001290268, 0x0, 0x0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:8169 +0xd0
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkCallExpression(0x140234f5308, 0x14001290268, 0x0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:8065 +0x50
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkExpressionWorker(0x140234f5308, 0x14001290268, 0x0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:7447 +0x2fc
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkExpressionEx(0x140234f5308, 0x14001290268, 0x0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:7235 +0x50
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkExpression(...)
        github.com/microsoft/typescript-go/internal/checker/checker.go:7228
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkTypeOfExpression(0x140234f5308, 0x140378e1b60?)
        github.com/microsoft/typescript-go/internal/checker/checker.go:10198 +0x34
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkExpressionWorker(0x140234f5308, 0x0?, 0x3e87f7f8?)
        github.com/microsoft/typescript-go/internal/checker/checker.go:7461 +0x40c
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkExpressionEx(0x140234f5308, 0x14000b1df00, 0x0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:7235 +0x50
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkBinaryLikeExpression(0x140234f5308, 0x14000b1df00, 0x140002bc990, 0x14001486508, 0x0, 0x1400128e0d0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:11877 +0xb0
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkBinaryExpression(...)
        github.com/microsoft/typescript-go/internal/checker/checker.go:11869
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkExpressionWorker(0x140234f5308, 0x100ff8eb0?, 0x3e87fa88?)
        github.com/microsoft/typescript-go/internal/checker/checker.go:7481 +0x460
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkExpressionEx(0x140234f5308, 0x1400128e0d0, 0x0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:7235 +0x50
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkTruthinessExpression(0x140234f5308, 0x1400128e0d0, 0x3e87fad8?)
        github.com/microsoft/typescript-go/internal/checker/checker.go:10526 +0x24
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkIfStatement(0x140234f5308, 0x140012902c0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:3615 +0x3c
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElementWorker(0x140234f5308, 0x140012902c0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2248 +0x268
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElement(0x140234f5308, 0x1?)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2162 +0x4c
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElements(0x140234f5308, {0x1400148c260, 0xa, 0x140218cf140?})
        github.com/microsoft/typescript-go/internal/checker/checker.go:2153 +0x34
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkBlock(0x140234f5308, 0x140014984a8)
        github.com/microsoft/typescript-go/internal/checker/checker.go:3603 +0x12c
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElementWorker(0x140234f5308, 0x140014984a8)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2242 +0x308
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElement(0x140234f5308, 0x1401f25a1c0?)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2162 +0x4c
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkFunctionOrMethodDeclaration(0x140234f5308, 0x1400148a2c0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:3255 +0x11c
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkFunctionDeclaration(0x140234f5308, 0x1400148a2c0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:3216 +0x24
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElementWorker(0x140234f5308, 0x1400148a2c0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2240 +0x2e0
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElement(0x140234f5308, 0x140218cf140?)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2162 +0x4c
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElements(0x140234f5308, {0x1400148a420, 0xd, 0x1400059c380?})
        github.com/microsoft/typescript-go/internal/checker/checker.go:2153 +0x34
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceFile(0x140234f5308, {0x1016ce2c0, 0x101cdf4e0}, 0x14001490608)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2126 +0xf4
github.com/microsoft/typescript-go/internal/checker.(*Checker).CheckSourceFile(0x140234f5308, {0x1016ce2c0, 0x101cdf4e0}, 0x14001490608)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2115 +0x64
github.com/microsoft/typescript-go/internal/compiler.(*Program).CheckSourceFiles.func1-range1(0x14024c3bf28?)
        github.com/microsoft/typescript-go/internal/compiler/program.go:355 +0x5c
github.com/microsoft/typescript-go/internal/compiler.(*checkerPool).Files.func1(0x1401819da40)
        github.com/microsoft/typescript-go/internal/compiler/checkerpool.go:82 +0x7c
github.com/microsoft/typescript-go/internal/compiler.(*Program).CheckSourceFiles.func1()
        github.com/microsoft/typescript-go/internal/compiler/program.go:353 +0xf0
github.com/microsoft/typescript-go/internal/core.(*parallelWorkGroup).Queue.func1()
        github.com/microsoft/typescript-go/internal/core/workgroup.go:42 +0x50
created by github.com/microsoft/typescript-go/internal/core.(*parallelWorkGroup).Queue in goroutine 1
        github.com/microsoft/typescript-go/internal/core/workgroup.go:40 +0x7c

tsconfig.json

{
  "extends": "../../../tsconfig.base.json",

  "include": ["src/**/*.js", "src/**/*.jsx", "src/**/*.ts", "src/**/*.tsx"],
  "exclude": [
    "**/node_modules"
  ],
  "watchOptions": {
    "excludeDirectories": ["**/node_modules", "dist"],
  },
  "compilerOptions": {
    "paths": {
      "@i18n": ["./src/i18n/i18n.ts"]
    }
  }
}

tsconfig.base.json

{
  "compilerOptions": {



    /* Base Options: */
    "esModuleInterop": true,
    "skipLibCheck": true,
    "target": "es2022",
    "lib": ["ESNext", "dom", "dom.iterable"],
    "allowJs": true,
    "resolveJsonModule": true,
    "isolatedModules": true,

    /* Strictness */
    "strict": true,


    /* decorators - experimental */
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,


    "allowSyntheticDefaultImports": true,


    /* react */
    "jsx": "react-jsx",


    /* no transpilaition from ts: */
    "noEmit": true,
    "module": "preserve",
    "moduleResolution": "bundler",


    /*proj reference*/
    "composite": true,
    "incremental": true,


  }
}

[ahejlsberg]

Any chance you can provide us with a repro?

[shmdhussain]

Hi

Right now I am in mobile, sorry I don't know how to reproduce, That repos are big and any tsserver logs can help?

[ahejlsberg]

Here's a short repro of what I think is the same issue:

// File foo.d.ts
declare function foo(): void;
declare namespace foo {}
export = foo;

// File index.ts
import * as foo from "./foo";
foo();

// File tsconfig.json
{
  "compilerOptions": {
    "module": "nodenext",
    "target": "esnext",
    "strict": true,
  }
}

Compiling with tsgo causes this crash:

panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x4 pc=0x7ff762febf32]

goroutine 108 [running]:
github.com/microsoft/typescript-go/internal/checker.(*Checker).getTypeOfSymbol(0xc002214880?, 0x7ff7637024e0?)
        c:/ts-go/internal/checker/checker.go:15882 +0x12
github.com/microsoft/typescript-go/internal/checker.(*Checker).invocationErrorRecovery(0xc002214008, 0xc0021b4540, 0x0, 0xc00008b560)
        c:/ts-go/internal/checker/checker.go:9758 +0xa5
github.com/microsoft/typescript-go/internal/checker.(*Checker).invocationError(0xc002214008, 0xc0021b4540?, 0xc0021b4540, 0x0, 0x0)
        c:/ts-go/internal/checker/checker.go:9747 +0xf1
github.com/microsoft/typescript-go/internal/checker.(*Checker).resolveCallExpression(0xc002214008, 0xc00012e0b0, 0x0, 0x0)
        c:/ts-go/internal/checker/checker.go:8289 +0x508
github.com/microsoft/typescript-go/internal/checker.(*Checker).resolveSignature(0xc002214760?, 0x7ff763702960?, 0xc00012e0b0?, 0x6306b1ce?)
        c:/ts-go/internal/checker/checker.go:8196 +0x46
github.com/microsoft/typescript-go/internal/checker.(*Checker).getResolvedSignature(0xc002214008, 0xc00012e0b0, 0x0, 0x0)
        c:/ts-go/internal/checker/checker.go:8168 +0xd8
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkCallExpression(0xc002214008, 0xc00012e0b0, 0x0)
        c:/ts-go/internal/checker/checker.go:8064 +0x4f
...

The crash is caused by the compiler accessing the wrong symbol links in invocationErrorRecovery. It's an easy fix. I'll put up a PR.