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2  "type": "Program",
3  "statements": [
4    {
5      "type": "VariableDeclaration",
6      "declarations": [
7        {
8          "type": "VariableDeclarator",
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13              "type": "TSUnionType",
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16                  "type": "TSTupleType",
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19                      "type": "TSNumberKeyword",
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31                    {
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168                        }
169                      }
170                    },
171                    {
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176                          "column": 17
177                        },
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182                      }
183                    },
184                    {
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190                        },
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271          },
272          "init": null,
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280              "column": 6
281            }
282          }
283        }
284      ],
285      "kind": "var",
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289          "column": 1
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291        "end": {
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293          "column": 52
294        }
295      }
296    },
297    {
298      "type": "ExpressionStatement",
299      "expression": {
300        "type": "AssignmentExpression",
301        "operator": "=",
302        "left": {
303          "type": "Identifier",
304          "name": "a",
305          "decorators": [],
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309              "column": 1
310            },
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314            }
315          }
316        },
317        "right": {
318          "type": "Identifier",
319          "name": "b",
320          "decorators": [],
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325            },
326            "end": {
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328              "column": 6
329            }
330          }
331        },
332        "loc": {
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335            "column": 1
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343      "loc": {
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355  "loc": {
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363    }
364  }
365}
366TypeError: Type '[number, number, number, number] | string[]' is not assignable to type '[number, number, number] | number[]'. [tupleAssignability24.ts:19:1]
367