Intermittent panic in tsgo cli; hard to reproduce

[Raynos]

Stack trace

~/projects/depscan on jake/typescript-go*
$ pnpm build:tsgo --stopBuildOnErrors
 WARN  Unsupported engine: wanted: {"node":"^22.18.0"} (current: {"node":"v22.17.0","pnpm":"10.16.1"})

> socket.dev@1.0.0 build:tsgo /Users/raynos/projects/depscan
> tsgo -b --verbose --stopBuildOnErrors

[11:53:42 AM] Projects in this build:
    * submodules/socket-patch/tsconfig.json
    * workspaces/lib/tsconfig.json
    * workspaces/legal-parser/tsconfig.json
    * workspaces/metadata-common/tsconfig.json
    * workspaces/metadata-service/tsconfig.json
    * workspaces/metadata-client/tsconfig.json
    * workspaces/obfuscated-pass/tsconfig.json
    * workspaces/reachability-pattern-tools/tsconfig.json
    * workspaces/pipeline/tsconfig.json
    * workspaces/analytics-schema/tsconfig.json
    * workspaces/clickhouse/tsconfig.json
    * workspaces/kafka/tsconfig.json
    * workspaces/app/tsconfig.json
    * tools/tsconfig.json
    * workspaces/analytics-shared/tsconfig.json
    * workspaces/analytics/tsconfig.json
    * workspaces/api-v0/tsconfig.json
    * workspaces/api-v1/tsconfig.json
    * workspaces/artifact-api-service/tsconfig.json
    * workspaces/artifact-search/tsconfig.json
    * workspaces/firewall-api-proxy/tsconfig.json
    * workspaces/gcp-admin/tsconfig.json
    * workspaces/gcs-bucket-server/tsconfig.json
    * workspaces/github-actions/tsconfig.json
    * workspaces/grafana-dashboards/tsconfig.json
    * workspaces/github-app/tsconfig.json
    * workspaces/github-interposer/tsconfig.json
    * workspaces/hosted-mcp/tsconfig.json
    * workspaces/metadata-service-admin/tsconfig.json
    * workspaces/metrics-exporter/tsconfig.json
    * workspaces/autotester/tsconfig.json
    * workspaces/vanta/tsconfig.json
    * workspaces/mini-services/tsconfig.json
    * workspaces/web-extension/tsconfig.json
    * workspaces/next-app/tsconfig.server.json
    * workspaces/reachability-analyzers-service/tsconfig.json
    * workspaces/subprocess-runner/tsconfig.json
    * tsconfig.json

[11:53:42 AM] Project 'submodules/socket-patch/tsconfig.json' is up to date because newest input 'submodules/socket-patch/src/utils.ts' is older than output 'submodules/socket-patch/dist/tsconfig.tsbuildinfo'

[11:53:42 AM] Project 'workspaces/lib/tsconfig.json' is out of date because output 'workspaces/lib/dist/tsconfig.tsbuildinfo' is older than input 'workspaces/lib/src/tracing/helpers.ts'

[11:53:42 AM] Building project 'workspaces/lib/tsconfig.json'...

[11:53:43 AM] Project 'workspaces/legal-parser/tsconfig.json' is out of date because output 'workspaces/legal-parser/dist/tsconfig.tsbuildinfo' is older than input 'workspaces/lib'

[11:53:43 AM] Building project 'workspaces/legal-parser/tsconfig.json'...

[11:53:44 AM] Updating unchanged output timestamps of project 'workspaces/legal-parser/tsconfig.json'...

[11:53:43 AM] Project 'workspaces/metadata-common/tsconfig.json' is out of date because output 'workspaces/metadata-common/dist/tsconfig.tsbuildinfo' is older than input 'workspaces/lib'

[11:53:43 AM] Building project 'workspaces/metadata-common/tsconfig.json'...

[11:53:43 AM] Updating unchanged output timestamps of project 'workspaces/metadata-common/tsconfig.json'...

panic: interface conversion: checker.TypeSystemEntity is nil, not *ast.Symbol

goroutine 142884 [running]:
github.com/microsoft/typescript-go/internal/checker.(*Checker).typeResolutionHasProperty(0x14063451448?, 0x10532d918?)
	github.com/microsoft/typescript-go/internal/checker/checker.go:18106 +0x304
github.com/microsoft/typescript-go/internal/checker.(*Checker).findResolutionCycleStartIndex(0x1406fe82608, {0x10573f6e0, 0x1406f858f50}, 0x9)
	github.com/microsoft/typescript-go/internal/checker/checker.go:18093 +0x80
github.com/microsoft/typescript-go/internal/checker.(*Checker).pushTypeResolution(0x1406fe82608, {0x10573f6e0, 0x1406f858f50}, 0x9)
	github.com/microsoft/typescript-go/internal/checker/checker.go:18066 +0x2c
github.com/microsoft/typescript-go/internal/checker.(*Checker).resolveAlias(0x1406fe82608, 0x1406f858f50)
	github.com/microsoft/typescript-go/internal/checker/checker.go:15677 +0x64
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkAliasSymbol(0x1406fe82608, 0x1403fb78370)
	github.com/microsoft/typescript-go/internal/checker/checker.go:6435 +0x3c
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkImportBinding(0x1406fe82608, 0x1403fb78370)
	github.com/microsoft/typescript-go/internal/checker/checker.go:5137 +0x48
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkImportDeclaration(0x1406fe82608, 0x1404ed13680)
	github.com/microsoft/typescript-go/internal/checker/checker.go:5071 +0x600
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElementWorker(0x1406fe82608, 0x1404ed13680)
	github.com/microsoft/typescript-go/internal/checker/checker.go:2291 +0x348
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElement(0x1406fe82608, 0x1403ef03830?)
	github.com/microsoft/typescript-go/internal/checker/checker.go:2163 +0x4c
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElements(0x1406fe82608, {0x1406b8652f0, 0x6, 0x1406709dbd0?})
	github.com/microsoft/typescript-go/internal/checker/checker.go:2154 +0x34
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceFile(0x1406fe82608, {0x1059271f0, 0x105f4b620}, 0x1406bbc6008)
	github.com/microsoft/typescript-go/internal/checker/checker.go:2127 +0xf4
github.com/microsoft/typescript-go/internal/checker.(*Checker).CheckSourceFile(0x1406fe82608, {0x1059271f0, 0x105f4b620}, 0x1406bbc6008)
	github.com/microsoft/typescript-go/internal/checker/checker.go:2116 +0x64
github.com/microsoft/typescript-go/internal/checker.(*Checker).getDiagnostics(0x1406fe82608, {0x1059271f0, 0x105f4b620}, 0x1406bbc6008, 0x1406fe827f0)
	github.com/microsoft/typescript-go/internal/checker/checker.go:13438 +0xac
github.com/microsoft/typescript-go/internal/checker.(*Checker).GetDiagnostics(...)
	github.com/microsoft/typescript-go/internal/checker/checker.go:13421
github.com/microsoft/typescript-go/internal/compiler.(*Program).getSemanticDiagnosticsForFileNotFilter(0x14066716a80, {0x1059271f0, 0x105f4b620}, 0x1406bbc6008)
	github.com/microsoft/typescript-go/internal/compiler/program.go:1037 +0x27c
github.com/microsoft/typescript-go/internal/compiler.(*Program).getSemanticDiagnosticsForFile(0x14066716a80, {0x1059271f0?, 0x105f4b620?}, 0x1406bbc6008)
	github.com/microsoft/typescript-go/internal/compiler/program.go:1012 +0x30
github.com/microsoft/typescript-go/internal/compiler.(*Program).getDiagnosticsHelper(0x0?, {0x1059271f0, 0x105f4b620}, 0x1406bbc6008?, 0x0?, 0x0?, 0x140453bcc28)
	github.com/microsoft/typescript-go/internal/compiler/program.go:1209 +0xf4
github.com/microsoft/typescript-go/internal/compiler.(*Program).GetSemanticDiagnostics(0x0?, {0x1059271f0?, 0x105f4b620?}, 0x10591d130?)
	github.com/microsoft/typescript-go/internal/compiler/program.go:416 +0x3c
github.com/microsoft/typescript-go/internal/compiler.GetDiagnosticsOfAnyProgram({0x1059271f0, 0x105f4b620}, {0x10592d2c0, 0x14066716a80}, 0x1406bbc6008, 0x1, 0x140453bcd60, 0x140453bcd48)
	github.com/microsoft/typescript-go/internal/compiler/program.go:1500 +0x364
github.com/microsoft/typescript-go/internal/compiler.HandleNoEmitOnError({0x1059271f0, 0x105f4b620}, {0x10592d2c0, 0x14066716a80}, 0x1406bbc6008)
	github.com/microsoft/typescript-go/internal/compiler/program.go:1457 +0x98
github.com/microsoft/typescript-go/internal/compiler.(*Program).Emit(0x14066716a80, {0x1059271f0, 0x105f4b620}, {0x1406bbc6008?, 0x60?, 0x1403ef03800?})
	github.com/microsoft/typescript-go/internal/compiler/program.go:1364 +0x74
github.com/microsoft/typescript-go/internal/execute/incremental.(*emitFilesHandler).emitFilesIncremental.func1.1()
	github.com/microsoft/typescript-go/internal/execute/incremental/emitfileshandler.go:124 +0x12c
github.com/microsoft/typescript-go/internal/core.(*parallelWorkGroup).Queue.func1()
	github.com/microsoft/typescript-go/internal/core/workgroup.go:40 +0x24
sync.(*WaitGroup).Go.func1()
	sync/waitgroup.go:239 +0x4c
created by sync.(*WaitGroup).Go in goroutine 285
	sync/waitgroup.go:237 +0x70
 ELIFECYCLE  Command failed with exit code 2.

Steps to reproduce

1. I edited a file in the monorepo with the text

// Tracer is the type of the opentelemetry Tracer interface or class. 
export type { Tracer }

or maybe

export { Tracer }

I tried changing some things and then could no longer reproduce this panic.

[Raynos]

Same panic, not sure what the cause is atm.

[04:16:58 PM] Project 'tools/tsconfig.json' is up to date because newest input 'tools/pipeline/artifact.ts' is older than output 'dist/tools/tsconfig.tsbuildinfo'

panic: interface conversion: checker.TypeSystemEntity is nil, not *ast.Symbol

goroutine 10502 [running]:
github.com/microsoft/typescript-go/internal/checker.(*Checker).typeResolutionHasProperty(0x14000ae1448?, 0x104c79918?)
        github.com/microsoft/typescript-go/internal/checker/checker.go:18106 +0x304
github.com/microsoft/typescript-go/internal/checker.(*Checker).findResolutionCycleStartIndex(0x1400ce03908, {0x10508b6e0, 0x1400cb72af0}, 0x9)
        github.com/microsoft/typescript-go/internal/checker/checker.go:18093 +0x80
github.com/microsoft/typescript-go/internal/checker.(*Checker).pushTypeResolution(0x1400ce03908, {0x10508b6e0, 0x1400cb72af0}, 0x9)
        github.com/microsoft/typescript-go/internal/checker/checker.go:18066 +0x2c
github.com/microsoft/typescript-go/internal/checker.(*Checker).resolveAlias(0x1400ce03908, 0x1400cb72af0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:15677 +0x64
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkAliasSymbol(0x1400ce03908, 0x1400a016580)
        github.com/microsoft/typescript-go/internal/checker/checker.go:6435 +0x3c
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkImportBinding(0x1400ce03908, 0x1400a016580)
        github.com/microsoft/typescript-go/internal/checker/checker.go:5137 +0x48
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkImportDeclaration(0x1400ce03908, 0x1400a02e960)
        github.com/microsoft/typescript-go/internal/checker/checker.go:5071 +0x600
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElementWorker(0x1400ce03908, 0x1400a02e960)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2291 +0x348
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElement(0x1400ce03908, 0x1400e2f9080?)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2163 +0x4c
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceElements(0x1400ce03908, {0x1400977b070, 0xe, 0x1400a070b00?})
        github.com/microsoft/typescript-go/internal/checker/checker.go:2154 +0x34
github.com/microsoft/typescript-go/internal/checker.(*Checker).checkSourceFile(0x1400ce03908, {0x1052731f0, 0x105897620}, 0x1400a054608)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2127 +0xf4
github.com/microsoft/typescript-go/internal/checker.(*Checker).CheckSourceFile(0x1400ce03908, {0x1052731f0, 0x105897620}, 0x1400a054608)
        github.com/microsoft/typescript-go/internal/checker/checker.go:2116 +0x64
github.com/microsoft/typescript-go/internal/checker.(*Checker).getDiagnostics(0x1400ce03908, {0x1052731f0, 0x105897620}, 0x1400a054608, 0x1400ce03af0)
        github.com/microsoft/typescript-go/internal/checker/checker.go:13438 +0xac
github.com/microsoft/typescript-go/internal/checker.(*Checker).GetDiagnostics(...)
        github.com/microsoft/typescript-go/internal/checker/checker.go:13421
github.com/microsoft/typescript-go/internal/compiler.(*Program).getSemanticDiagnosticsForFileNotFilter(0x14000682e00, {0x1052731f0, 0x105897620}, 0x1400a054608)
        github.com/microsoft/typescript-go/internal/compiler/program.go:1037 +0x27c
github.com/microsoft/typescript-go/internal/compiler.(*Program).getSemanticDiagnosticsForFile(0x14000682e00, {0x1052731f0?, 0x105897620?}, 0x1400a054608)
        github.com/microsoft/typescript-go/internal/compiler/program.go:1012 +0x30
github.com/microsoft/typescript-go/internal/compiler.(*Program).getDiagnosticsHelper(0x0?, {0x1052731f0, 0x105897620}, 0x1400a054608?, 0x0?, 0x0?, 0x14000607c28)
        github.com/microsoft/typescript-go/internal/compiler/program.go:1209 +0xf4
github.com/microsoft/typescript-go/internal/compiler.(*Program).GetSemanticDiagnostics(0x0?, {0x1052731f0?, 0x105897620?}, 0x105269130?)
        github.com/microsoft/typescript-go/internal/compiler/program.go:416 +0x3c
github.com/microsoft/typescript-go/internal/compiler.GetDiagnosticsOfAnyProgram({0x1052731f0, 0x105897620}, {0x1052792c0, 0x14000682e00}, 0x1400a054608, 0x1, 0x14000607d60, 0x14000607d48)
        github.com/microsoft/typescript-go/internal/compiler/program.go:1500 +0x364
github.com/microsoft/typescript-go/internal/compiler.HandleNoEmitOnError({0x1052731f0, 0x105897620}, {0x1052792c0, 0x14000682e00}, 0x1400a054608)
        github.com/microsoft/typescript-go/internal/compiler/program.go:1457 +0x98
github.com/microsoft/typescript-go/internal/compiler.(*Program).Emit(0x14000682e00, {0x1052731f0, 0x105897620}, {0x1400a054608?, 0x80?, 0x1400ca49080?})
        github.com/microsoft/typescript-go/internal/compiler/program.go:1364 +0x74
github.com/microsoft/typescript-go/internal/execute/incremental.(*emitFilesHandler).emitFilesIncremental.func1.1()
        github.com/microsoft/typescript-go/internal/execute/incremental/emitfileshandler.go:124 +0x12c
github.com/microsoft/typescript-go/internal/core.(*parallelWorkGroup).Queue.func1()
        github.com/microsoft/typescript-go/internal/core/workgroup.go:40 +0x24
sync.(*WaitGroup).Go.func1()
        sync/waitgroup.go:239 +0x4c
created by sync.(*WaitGroup).Go in goroutine 93
        sync/waitgroup.go:237 +0x70
 ELIFECYCLE  Command failed with exit code 2.

[jakebailey]

It can only be that HandleNoEmitOnError is not locking on checkers.

[jakebailey]

Consolidating to #2061. If the panic is a race in the checker starting at HandleNoEmitOnError, then it's the same issue just happening for a different map.