Upgrade to ng10 issue: invalid JSON character: \n

[LanderBeeuwsaert]

🐞 Bug report

Command (mark with an x)

• [ X] update

Is this a regression?

not really, more an upgrade problem

Description

During upgrade from 9.1.9 to 10; and running the upgrade script.
We get this error during the tsconfig.json upgrade step:

however, we don't have any tsconfig.json that is 30 lines long.
The tsconfig.jsons we have are:

./tsconfig.json:
{
"compileOnSave": false,
"compilerOptions": {
"allowSyntheticDefaultImports": true,
"downlevelIteration": true,
"module": "esnext",
"outDir": "./dist/out-tsc",
"baseUrl": "src",
"sourceMap": true,
"declaration": false,
"moduleResolution": "node",
"experimentalDecorators": true,
"target": "es2015",
"typeRoots": ["node_modules/@types"],
"lib": ["es2016", "dom"],
"types": ["gapi", "gapi.auth2", "gapi.client.sheets"]
},
"exclude": ["node_modules", "spec", "cypress"]
}

./tsconfig.spec.json
//used by jest

{
"extends": "./tsconfig.json",
"compilerOptions": {
"module": "commonjs",
"outDir": "./out-tsc/spec",
"types": [
"jest",
"node"
],
"esModuleInterop": false,
"emitDecoratorMetadata": true
},
"files": [
"src/test.ts",
"src/polyfills.ts"
],
"include": [
"spec/tests//*.spec.ts",
"spec/tests//*.d.ts"
]
}

./src/tsconfig.app.json:
{
"extends": "../tsconfig.json",
"compilerOptions": {
"outDir": "../out-tsc/app",
"baseUrl": "",
"types": ["node", "jquery", "hammerjs", "bowser", "google.analytics", "stripe-v3", "gapi", "gapi.auth2", "gapi.client.sheets", "color"],
"paths": {
"jszip": ["../node_modules/jszip/dist/jszip.min.js"]
}
},
"files": ["main.ts", "polyfills.ts"]
}

./cypress/tsconfig.json:
{
"compilerOptions": {
"strict": false,
"baseUrl": "../node_modules",
"target": "es5",
"lib": ["es5", "dom"],
"types": ["cypress"]
},
"include": [
"**/*.ts"
]
}

./functions/tsconfig.json:
{
"compilerOptions": {
"lib": [
"esnext",
"dom"
],
"types": ["googlemaps"],
"module": "commonjs",
"noImplicitReturns": true,
"esModuleInterop": true,
"allowSyntheticDefaultImports": true,
"outDir": "lib",
"sourceMap": true,
"target": "es2017"
},
"compileOnSave": true,
"include": [
"src"
]
}

🌍 Your Environment

windows 10, webstorm, npm.

[alan-agius4]

@LanderBeeuwsaert, the issue might be arising from any file with a .json extension.

We have a fix incoming which when an error occurs we print out the file name of the offending file.

[LanderBeeuwsaert]

@alan-agius4 yeah, I was thinking that yesterday, if I would have the name of the offending file I'm almost certainly ok. Thanks!

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