{
  "message": "cannot assign to captured outer variable in an `FnMut` closure",
  "code": {
    "code": "E0594",
    "explanation": null
  },
  "level": "error",
  "spans": [
    {
      "file_name": "./tests/everything/closure-immutable-outer-variable.rs",
      "byte_start": 615,
      "byte_end": 624,
      "line_start": 19,
      "line_end": 19,
      "column_start": 26,
      "column_end": 35,
      "is_primary": true,
      "text": [
        {
          "text": "    foo(Box::new(move || y = false) as Box<_>); //~ ERROR cannot assign to captured outer variable",
          "highlight_start": 26,
          "highlight_end": 35
        }
      ],
      "label": null,
      "suggested_replacement": null,
      "expansion": null
    }
  ],
  "children": [
    {
      "message": "consider making `y` mutable",
      "code": null,
      "level": "help",
      "spans": [
        {
          "file_name": "./tests/everything/closure-immutable-outer-variable.rs",
          "byte_start": 580,
          "byte_end": 581,
          "line_start": 18,
          "line_end": 18,
          "column_start": 9,
          "column_end": 10,
          "is_primary": true,
          "text": [
            {
              "text": "    let y = true;",
              "highlight_start": 9,
              "highlight_end": 10
            }
          ],
          "label": null,
          "suggested_replacement": "mut y",
          "expansion": null
        }
      ],
      "children": [],
      "rendered": null
    }
  ],
  "rendered": "error[E0594]: cannot assign to captured outer variable in an `FnMut` closure\n  --> ./tests/everything/closure-immutable-outer-variable.rs:19:26\n   |\n18 |     let y = true;\n   |         - help: consider making `y` mutable: `mut y`\n19 |     foo(Box::new(move || y = false) as Box<_>); //~ ERROR cannot assign to captured outer variable\n   |                          ^^^^^^^^^\n\nIf you want more information on this error, try using \"rustc --explain E0594\"\n"
}
{
  "message": "aborting due to previous error",
  "code": null,
  "level": "error",
  "spans": [],
  "children": [],
  "rendered": "error: aborting due to previous error\n\n"
}