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1{
2  "type": "Program",
3  "statements": [
4    {
5      "type": "VariableDeclaration",
6      "declarations": [
7        {
8          "type": "VariableDeclarator",
9          "id": {
10            "type": "Identifier",
11            "name": "a",
12            "decorators": [],
13            "loc": {
14              "start": {
15                "line": 17,
16                "column": 5
17              },
18              "end": {
19                "line": 17,
20                "column": 6
21              }
22            }
23          },
24          "init": {
25            "type": "ArrayExpression",
26            "elements": [
27              {
28                "type": "NumberLiteral",
29                "value": 0,
30                "loc": {
31                  "start": {
32                    "line": 17,
33                    "column": 10
34                  },
35                  "end": {
36                    "line": 17,
37                    "column": 11
38                  }
39                }
40              },
41              {
42                "type": "NumberLiteral",
43                "value": 1,
44                "loc": {
45                  "start": {
46                    "line": 17,
47                    "column": 13
48                  },
49                  "end": {
50                    "line": 17,
51                    "column": 14
52                  }
53                }
54              },
55              {
56                "type": "NumberLiteral",
57                "value": 2,
58                "loc": {
59                  "start": {
60                    "line": 17,
61                    "column": 16
62                  },
63                  "end": {
64                    "line": 17,
65                    "column": 17
66                  }
67                }
68              },
69              {
70                "type": "NumberLiteral",
71                "value": 3,
72                "loc": {
73                  "start": {
74                    "line": 17,
75                    "column": 19
76                  },
77                  "end": {
78                    "line": 17,
79                    "column": 20
80                  }
81                }
82              },
83              {
84                "type": "NumberLiteral",
85                "value": 4,
86                "loc": {
87                  "start": {
88                    "line": 17,
89                    "column": 22
90                  },
91                  "end": {
92                    "line": 17,
93                    "column": 23
94                  }
95                }
96              }
97            ],
98            "loc": {
99              "start": {
100                "line": 17,
101                "column": 9
102              },
103              "end": {
104                "line": 17,
105                "column": 24
106              }
107            }
108          },
109          "loc": {
110            "start": {
111              "line": 17,
112              "column": 5
113            },
114            "end": {
115              "line": 17,
116              "column": 24
117            }
118          }
119        }
120      ],
121      "kind": "var",
122      "loc": {
123        "start": {
124          "line": 17,
125          "column": 1
126        },
127        "end": {
128          "line": 17,
129          "column": 25
130        }
131      }
132    },
133    {
134      "type": "VariableDeclaration",
135      "declarations": [
136        {
137          "type": "VariableDeclarator",
138          "id": {
139            "type": "Identifier",
140            "name": "b",
141            "typeAnnotation": {
142              "type": "TSNumberKeyword",
143              "loc": {
144                "start": {
145                  "line": 18,
146                  "column": 8
147                },
148                "end": {
149                  "line": 18,
150                  "column": 14
151                }
152              }
153            },
154            "decorators": [],
155            "loc": {
156              "start": {
157                "line": 18,
158                "column": 5
159              },
160              "end": {
161                "line": 18,
162                "column": 6
163              }
164            }
165          },
166          "init": null,
167          "loc": {
168            "start": {
169              "line": 18,
170              "column": 5
171            },
172            "end": {
173              "line": 18,
174              "column": 6
175            }
176          }
177        }
178      ],
179      "kind": "var",
180      "loc": {
181        "start": {
182          "line": 18,
183          "column": 1
184        },
185        "end": {
186          "line": 18,
187          "column": 15
188        }
189      }
190    },
191    {
192      "type": "VariableDeclaration",
193      "declarations": [
194        {
195          "type": "VariableDeclarator",
196          "id": {
197            "type": "Identifier",
198            "name": "c",
199            "typeAnnotation": {
200              "type": "TSBooleanKeyword",
201              "loc": {
202                "start": {
203                  "line": 19,
204                  "column": 8
205                },
206                "end": {
207                  "line": 19,
208                  "column": 15
209                }
210              }
211            },
212            "decorators": [],
213            "loc": {
214              "start": {
215                "line": 19,
216                "column": 5
217              },
218              "end": {
219                "line": 19,
220                "column": 6
221              }
222            }
223          },
224          "init": null,
225          "loc": {
226            "start": {
227              "line": 19,
228              "column": 5
229            },
230            "end": {
231              "line": 19,
232              "column": 6
233            }
234          }
235        }
236      ],
237      "kind": "var",
238      "loc": {
239        "start": {
240          "line": 19,
241          "column": 1
242        },
243        "end": {
244          "line": 19,
245          "column": 16
246        }
247      }
248    },
249    {
250      "type": "ExpressionStatement",
251      "expression": {
252        "type": "AssignmentExpression",
253        "operator": "=",
254        "left": {
255          "type": "Identifier",
256          "name": "b",
257          "decorators": [],
258          "loc": {
259            "start": {
260              "line": 20,
261              "column": 1
262            },
263            "end": {
264              "line": 20,
265              "column": 2
266            }
267          }
268        },
269        "right": {
270          "type": "ChainExpression",
271          "expression": {
272            "type": "MemberExpression",
273            "object": {
274              "type": "Identifier",
275              "name": "a",
276              "decorators": [],
277              "loc": {
278                "start": {
279                  "line": 20,
280                  "column": 5
281                },
282                "end": {
283                  "line": 20,
284                  "column": 6
285                }
286              }
287            },
288            "property": {
289              "type": "AssignmentExpression",
290              "operator": "=",
291              "left": {
292                "type": "Identifier",
293                "name": "c",
294                "decorators": [],
295                "loc": {
296                  "start": {
297                    "line": 20,
298                    "column": 9
299                  },
300                  "end": {
301                    "line": 20,
302                    "column": 10
303                  }
304                }
305              },
306              "right": {
307                "type": "NumberLiteral",
308                "value": 5,
309                "loc": {
310                  "start": {
311                    "line": 20,
312                    "column": 13
313                  },
314                  "end": {
315                    "line": 20,
316                    "column": 14
317                  }
318                }
319              },
320              "loc": {
321                "start": {
322                  "line": 20,
323                  "column": 9
324                },
325                "end": {
326                  "line": 20,
327                  "column": 14
328                }
329              }
330            },
331            "computed": true,
332            "optional": true,
333            "loc": {
334              "start": {
335                "line": 20,
336                "column": 5
337              },
338              "end": {
339                "line": 20,
340                "column": 15
341              }
342            }
343          },
344          "loc": {
345            "start": {
346              "line": 20,
347              "column": 5
348            },
349            "end": {
350              "line": 20,
351              "column": 15
352            }
353          }
354        },
355        "loc": {
356          "start": {
357            "line": 20,
358            "column": 1
359          },
360          "end": {
361            "line": 20,
362            "column": 15
363          }
364        }
365      },
366      "loc": {
367        "start": {
368          "line": 20,
369          "column": 1
370        },
371        "end": {
372          "line": 20,
373          "column": 16
374        }
375      }
376    }
377  ],
378  "loc": {
379    "start": {
380      "line": 1,
381      "column": 1
382    },
383    "end": {
384      "line": 21,
385      "column": 1
386    }
387  }
388}
389TypeError: Type 'number' is not assignable to type 'boolean'. [member_expression_69.ts:20:9]
390