{
  "schema": "ailang/v0",
  "name": "test_mut_var_captured_by_lambda",
  "imports": [],
  "defs": [
    {
      "kind": "fn",
      "name": "main",
      "type": {
        "k": "fn",
        "params": [],
        "ret": { "k": "con", "name": "Int" },
        "effects": []
      },
      "params": [],
      "doc": "Iter mut.4-tidy: a lambda inside a mut block that references the enclosing mut-var `x` is rejected with mut-var-captured-by-lambda. Mut-vars are alloca-resident and lexically scoped; lifting them into a heap-closure env is deferred to a follow-on milestone (ref-types + !Mut effect).",
      "body": {
        "t": "mut",
        "vars": [
          {
            "name": "x",
            "type": { "k": "con", "name": "Int" },
            "init": { "t": "lit", "lit": { "kind": "int", "value": 0 } }
          }
        ],
        "body": {
          "t": "let",
          "name": "f",
          "value": {
            "t": "lam",
            "params": [],
            "paramTypes": [],
            "retType": { "k": "con", "name": "Int" },
            "effects": [],
            "body": { "t": "var", "name": "x" }
          },
          "body": { "t": "lit", "lit": { "kind": "int", "value": 0 } }
        }
      }
    }
  ]
}