Smartstep skips source code

[richardspence]

• VSCode Version: 1.31.1
• OS Version:MacOS Mojave

Smartstep ignores code that are generated from async/await using ts-node. The workaround is to disable smartStep in the launch.json

Repro files:
Launch.json:

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "node",
            "request": "launch",
            "name": "Mocha Current File (ts-node)",
            "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
            "runtimeArgs": [
                "--preserve-symlinks",
                "-r",
                "ts-node/register",
            ],
            "args": [
                "--timeout",
                "999999",
                "--colors",
                "${file}"
            ],
            "runtimeExecutable": "~/.nvm/versions/node/v11.1.0/bin/node",
            "sourceMaps": true,
            "protocol": "auto",
            "console": "integratedTerminal",
            "internalConsoleOptions": "neverOpen",
            "env": {
                "TS_NODE_FILES": "true"
            },
            "smartStep": true,
        },
    ]
}

Test File

import { suite, test, } from 'mocha-typescript';
import * as sinon from 'sinon';
import { SinonSandbox } from 'sinon';
import { expect, assert } from 'chai';
import BluebirdPromise = require('bluebird');

@suite
export class PlayerControlApiDecSpec {

   
    @test
    public async test(){
        const answer = await BluebirdPromise.resolve(15);
        expect(answer).to.eql(15);
    }

}

tsconfig.json

{
    "compilerOptions": {
        "experimentalDecorators": true,
        "module": "commonjs",
        "target": "es5",
        
    }
}

Package.json

{
  "name": "scratch",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@types/bluebird-global": "^3.5.10",
    "@types/chai": "^4.1.7",
    "chai": "^4.2.0",
    "mocha": "^5.2.0",
    "mocha-typescript": "^1.1.17",
    "sinon": "^7.2.3",
    "ts-node": "^8.0.2",
    "typescript": "^3.3.3"
  },
  "dependencies": {
    "bluebird": "^3.5.3"
  }
}

Does this issue occur when all extensions are disabled?: Yes

[roblourens]

Thanks for all the details, this is #68127 (comment)