VSCode tasks with problem matchers for Rust

tasks.json

{
  // See https://go.microsoft.com/fwlink/?LinkId=733558
  // for the documentation about the tasks.json format
  "version": "2.0.0",
  "tasks": [
    {
      "label": "Build",
      "type": "shell",
      "command": "cargo build",
      "group": {
        "kind": "build",
        "isDefault": true
      },
      "presentation": {
        "clear": true,
      },
      "problemMatcher": {
        "owner": "rust",
        "fileLocation": [
          "relative",
          "${workspaceFolder}"
        ],
        "pattern": [
          {
            "regexp": "(error(\\[E\\d+\\])?|warning): (.*)",
            "severity": 1,
            "message": 3
          },
          {
            "regexp": "\\s+--> ([^:]+):(\\d+):(\\d+)",
            "file": 1,
            "line": 2,
            "column": 3
          }
        ]
      }
    },
    {
      "label": "Test",
      "type": "shell",
      "command": "cargo test --lib",
      "group": {
        "kind": "test",
        "isDefault": true
      },
      "presentation": {
        "clear": true
      },
      "problemMatcher": {
        "owner": "rust",
        "fileLocation": ["relative", "${workspaceFolder}"],
        "pattern":[
          {
            "regexp": "(error(\\[E\\d+\\])?|warning): (.*)",
            "severity": 1,
            "message": 3
          },
          {
            "regexp": "\\s+--> ([^:]+):(\\d+):(\\d+)",
            "file": 1,
            "line": 2,
            "column": 3
          }
        ]
      }
    },
    {
      "label": "Format",
      "type": "shell",
      "command": "cargo fmt",
      "presentation": {
        "clear": true
      },
      "problemMatcher": []
    }
  ]
}