message: IDE default to build, not test
diff: "problemMatcher": [
  "$rustc"
  ],
  - "group": "build",
  + "group": {
  + "kind": "build",
  + "isDefault": true
  + },
  "options" : {
  "cwd" : "${workspaceFolder}"
  },
  "problemMatcher": [
  "$rustc"
  ],
  - "group": {
  - "kind": "build",
  - "isDefault": true
  - },
  + "group": "build",
  "options" : {
  "cwd" : "${workspaceFolder}"
  },
  