{"version": 1,
 "uri": "file:///4880.lean",
 "diagnostics":
 [{"source": "Lean 4",
   "severity": 1,
   "range":
   {"start": {"line": 16, "character": 12},
    "end": {"line": 17, "character": 0}},
   "message":
   "could not synthesize default value for field 'h1' of 'B' using tactics",
   "fullRange":
   {"start": {"line": 16, "character": 12},
    "end": {"line": 20, "character": 0}}},
  {"source": "Lean 4",
   "severity": 1,
   "range":
   {"start": {"line": 16, "character": 12},
    "end": {"line": 17, "character": 0}},
   "message":
   "failed to synthesize\n  A\nAdditional diagnostic information may be available using the `set_option diagnostics true` command.",
   "fullRange":
   {"start": {"line": 16, "character": 12},
    "end": {"line": 20, "character": 0}}},
  {"source": "Lean 4",
   "severity": 1,
   "range":
   {"start": {"line": 22, "character": 17},
    "end": {"line": 22, "character": 20}},
   "message":
   "could not synthesize default value for parameter '_h1' using tactics",
   "fullRange":
   {"start": {"line": 22, "character": 17},
    "end": {"line": 22, "character": 20}}},
  {"source": "Lean 4",
   "severity": 1,
   "range":
   {"start": {"line": 22, "character": 17},
    "end": {"line": 22, "character": 20}},
   "message":
   "failed to synthesize\n  A\nAdditional diagnostic information may be available using the `set_option diagnostics true` command.",
   "fullRange":
   {"start": {"line": 22, "character": 17},
    "end": {"line": 22, "character": 20}}},
  {"source": "Lean 4",
   "severity": 1,
   "range":
   {"start": {"line": 34, "character": 13},
    "end": {"line": 35, "character": 0}},
   "message": "unsolved goals\n⊢ A",
   "fullRange":
   {"start": {"line": 34, "character": 13},
    "end": {"line": 36, "character": 0}}}]}