Command variable substitution hangs tasks.json

[brianignacio5]

Issue Type: Bug

Specify a task in tasks.json (also happens in launch.json) that uses ${command: command_id } in args or options env (places I've tried).

As an extension developer, I've made some predefined tasks.json that uses an extension command (specified by command_id) in those tasks with variable substitution. This doesn't seem to work anymore after 1.47 config and workspaceFolder variables seems to work.

Steps to reproduce:

1. Make a task in tasks.json that uses ${command: command_id } of some extension.
2. Try to execute this task with F1 -> Run task
3. Nothing happens. No Error and no output log.

VS Code version: Code 1.47.2 (17299e4, 2020-07-15T18:18:50.054Z)
OS version: Darwin x64 19.5.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz (4 x 2300)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on oop_rasterization: disabled_off protected_video_decode: unavailable_off rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled viz_display_compositor: enabled_on viz_hit_test_surface_layer: disabled_off_ok webgl: enabled webgl2: enabled
Load (avg)	2, 4, 5
Memory (System)	8.00GB (0.03GB free)
Process Argv	-psn_0_528513
Screen Reader	no
VM	0%

Extensions (11)

Extension	Author (truncated)	Version
vscode-dash	dee	2.4.0
prettier-vscode	esb	5.1.3
vscode-drawio	hed	0.7.2
vscode-docker	ms-	1.3.1
vscode-language-pack-es	MS-	1.47.3
python	ms-	2020.7.94776
cpptools	ms-	0.29.0
vscode-typescript-tslint-plugin	ms-	1.2.3
vetur	oct	0.24.0
fix-json	oli	0.1.2
tslint-vue	pro	1.5.6

[alexr00]

I can't repro this issue. Does it still occur if you disable all extensions? It is possible that an extension is getting stuck during activation and is causing this (in which case you can file an issue with that extension).

My task:

    {
      "label": "My Task",
      "type": "shell",
      "command": "echo",
      "args": [
        "${command:extension.helloWorld}"
      ],
      "problemMatcher": []
    }

My command:

const disposable = vscode.commands.registerCommand('extension.helloWorld', async () => {
		return 'My command output';
	});

[vscode-triage-bot]

We closed this issue because we are unable to reproduce the problem with the steps you describe. Chances are we've already fixed your problem in a recent version of VS Code. If not, please ask us to reopen the issue and provide us with more detail. Our issue reporting guidelines might help you with that.

Happy Coding!

[brianignacio5]

@alexr00 found the root of the problem and is related to the extension. Sorry for the troubles and thank you.