TS Server fatal error: Debug Failure. False expression.

[CKiOne]

TypeScript Version: 3.9,7

Version 3.8.3 works but 3.9.7 throws error:

tsc --build tsconfig.json

C:\Users\b36.BAUGRUPPE\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:82931
throw e;
^

Error: Debug Failure. False expression.
at getConstructorDefinedThisAssignmentTypes (C:\Users\b3\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:34450:22)
at getWidenedTypeForAssignmentDeclaration (C:\Users\b3\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:34307:63)
at getTypeOfVariableOrParameterOrPropertyWorker (C:\Users\b3\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:34616:24)
at getTypeOfVariableOrParameterOrProperty (C:\Users\b3\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:34573:28)
at getTypeOfSymbol (C:\Users\b3\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:34873:24)
at getTypeOfInstantiatedSymbol (C:\Users\b3\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:34830:44)
at getTypeOfSymbol (C:\Users\b3\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:34864:24)
at isPropertySymbolTypeRelated (C:\Users\b36.BAUGRUPPE\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:41735:30)
at propertyRelatedTo (C:\Users\b3\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:41800:31)
at propertiesRelatedTo (C:\Users\b3\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:41921:43)

Search Terms: Compile Error

Unfortunately i can't share and I don't know which file is producing this error.

[minestarks]

@RyanCavanaugh found possible repro at https://github.com/microsoft/tsserverfuzzer/issues/244

[CKiOne]

Hi, is there something i can do to help you with this issue?

[minestarks]

@ninichki if you could try and see if it still repros with typescript@next we'd be grateful.

[RokitSalad]

I'm having the exact same problem, by the look of things:

PS C:\Code\Playground\hackchartingservice_erm\lambdas\create-chart> yarn run build
yarn run v1.22.4
$ tsc && webpack
C:\Code\Playground\hackchartingservice_erm\node_modules\typescript\lib\tsc.js:82931
throw e;
^

Error: Debug Failure. False expression.
at getConstructorDefinedThisAssignmentTypes (C:\Code\Playground\hackchartingservice_erm\node_modules\typescript\lib\tsc.js:34450:22)
at getWidenedTypeForAssignmentDeclaration (C:\Code\Playground\hackchartingservice_erm\node_modules\typescript\lib\tsc.js:34307:63)
at getTypeOfVariableOrParameterOrPropertyWorker (C:\Code\Playground\hackchartingservice_erm\node_modules\typescript\lib\tsc.js:34616:24)
at getTypeOfVariableOrParameterOrProperty (C:\Code\Playground\hackchartingservice_erm\node_modules\typescript\lib\tsc.js:34573:28)
at getTypeOfSymbol (C:\Code\Playground\hackchartingservice_erm\node_modules\typescript\lib\tsc.js:34873:24)
at checkPropertyAccessExpressionOrQualifiedName (C:\Code\Playground\hackchartingservice_erm\node_modules\typescript\lib\tsc.js:47692:53)
at checkPropertyAccessExpression (C:\Code\Playground\hackchartingservice_erm\node_modules\typescript\lib\tsc.js:47559:17)
at checkExpressionWorker (C:\Code\Playground\hackchartingservice_erm\node_modules\typescript\lib\tsc.js:51572:28)
at checkExpression (C:\Code\Playground\hackchartingservice_erm\node_modules\typescript\lib\tsc.js:51499:38)
at checkPrefixUnaryExpression (C:\Code\Playground\hackchartingservice_erm\node_modules\typescript\lib\tsc.js:50412:31)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

I've tried upgrading typescript from 3.9.3 to 3.9.7, but it's still happening.

[RokitSalad]

Just so you're aware, the problem doesn't seem to be due to any specific source file. I've commented out the contents of all source files (*.ts x7, *.js x2) - the exact error still occurs.

tsconfig.json:
{
"compilerOptions": {
"outDir": "out",
"allowJs": true,
"declaration": true,
"esModuleInterop": true,
"inlineSourceMap": true,
"inlineSources": true,
"target":"ES2018",
"module": "commonjs",
"lib": [
"es2018",
"dom"
],
"strict": true,
"noImplicitAny": true,
"strictNullChecks": true,
"noImplicitThis": true,
"alwaysStrict": true,
"noUnusedLocals": true,
"noUnusedParameters": true,
"noImplicitReturns": true,
"noFallthroughCasesInSwitch": false,
"experimentalDecorators": true,
"strictPropertyInitialization":false,
}
}

package.json:
{
"name": "create-charts-v2",
"version": "1.0.0",
"private": true,
"license": "ISC",
"main": "dist/index.js",
"directories": {
"test": "tests"
},
"scripts": {
"build": "del /Q /S out dist && tsc && webpack",
"webpack": "webpack",
"build:lambda": "yarn run build",
"watch": "del /Q /S out dist && tsc -w",
"watch-run": "tsc-watch --onSuccess "ts-node ./src/indexLocalDev.ts""
},
"devDependencies": {
"@types/jest": "^26.0.3",
"@types/node": "^14.0.14",
"aws-cdk": "~1.46.0",
"jest": "^26.1.0",
"jest-junit": "^11.0.1",
"ts-jest": "26.1.1",
"ts-node": "^8.10.2",
"clean-webpack-plugin": "^3.0.0",
"ts-loader": "^7.0.1",
"tsc-watch": "^4.2.3",
"webpack": "^4.43.0",
"webpack-cli": "^3.3.11"
},
"dependencies": {
"@erm/lambda-helpers": "^0.0.4-alpha",
"@erm/logger": "^0.0.8-alpha",
"@erm/sidecar-aws": "^0.0.5-alpha",
"@types/d3": "^5.7.2",
"@types/d3-axis": "^1.0.12",
"@types/d3-color": "^1.2.2",
"@types/d3-scale": "^2.2.0",
"@types/d3-selection": "^1.4.1",
"@types/d3-time-format": "^2.1.1",
"@types/jsdom": "^16.2.1",
"@types/lodash": "^4.14.150",
"@types/node": "^13.13.4",
"aws-sdk": "^2.705.0",
"d3": "^5.16.0",
"g": "^2.0.1",
"jsdom": "^16.2.2",
"lodash-ts": "^1.2.7",
"moment": "^2.24.0"
}
}

[CKiOne]

Hello @minestarks ,
I tested it with Version 4.0.0-dev.20200803
but I get the same error:

[9:37:03] Building project 'tsconfig.json'...

C:\Users\b\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:84747
throw e;

Error: Debug Failure. False expression.
at getConstructorDefinedThisAssignmentTypes (C:\Users\b\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:40555:22)
at getWidenedTypeForAssignmentDeclaration (C:\Users\b\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:40410:67)
at getTypeOfVariableOrParameterOrPropertyWorker (C:\Users\b\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:40713:24)
at getTypeOfVariableOrParameterOrProperty (C:\Users\b\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:40666:28)
at getTypeOfSymbol (C:\Users\b\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:40970:24)
at getTypeOfInstantiatedSymbol (C:\Users\b\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:40927:44)
at getTypeOfSymbol (C:\Users\b3\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:40961:24)
at isPropertySymbolTypeRelated (C:\Users\b\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:48079:30)
at propertyRelatedTo (C:\Users\b\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:48144:31)
at propertiesRelatedTo (C:\Users\b\AppData\Roaming\npm\node_modules\typescript\lib\tsc.js:48319:43)
PS C:\dev\Projects\B\A> tsc --version
Version 4.0.0-dev.20200803

[CKiOne]

Hi,
I debuged into this and I found, that this line of typedefinition makes the problem.

declare module $data {
export class Guid implements Object {
constructor(value: string);
value: string;
}
}

But I'm not sure what's realy the problem. Maybe because it's a typedefinition for a javascript file?
It is finding the type "value" 2 times.

Maybe somebody has an explaination? For me it is working again, now.

kind regards

Christian

[jakebailey]

Turns out that this is actually the same as #51521; I've tested and it is. That one has more info and a fix on #51524 (my PR is likely worse).