Node 7 sends ASCII control characters not handled by the TerminalDecoder

[dbaeumer]

• VSCode Version: insider
• OS Version: Windows

Steps to Reproduce:

• node 7.4.0
• typescript installed locally
• tasks.json

{
    "version": "2.0.0",

    // we want to run npm
    "command": "npm",

    "type": "shell",

    "presentation": {
        "reveal": "never"
    },
    "group": { "kind": "build", "isPrimary": true },

    // we run the custom script "compile" as defined in package.json
    "args": ["run", "compile", "--loglevel", "silent"],

    // The tsc compiler is started in watching mode
    "isBackground": true,

    // use the standard tsc in watch mode problem matcher to find compile problems in the output.
    "problemMatcher": "$tsc-watch"
}

• TS file and tsconfig.json
• run the task

Observe: the spinner never quits. The reason is that node 7.x sends an ASCII control sequence like 27]...BEL which is not handled by the terminal decoder.

Reproduces without extensions: Yes/No

[dbaeumer]

See also: #29840