nim jsondoc output is broken

[geotre]

jsondoc command does not produce output on 1.6.* or devel. It works correctly on 1.4.8.

Example code.nim

proc doSomething*(x, y: int): int =
  x + y

const
  a* = 1
  b* = "test"

type
  MyEnum* = enum
    foo, bar

Current Output

{"orig":".../code.nim","nimble":"unknown","moduleDescription":"","entries":[]}

Expected Output

{"orig":".../code.nim","nimble":"","moduleDescription":"","entries":[{"name":"doSomething","type":"skProc","line":2,"col":0,"code":"proc doSomething(x, y: int): int {.raises: [], tags: [].}","signature":{"return":"int","arguments":[{"name":"x","type":"int"},{"name":"y","type":"int"}],"pragmas":["raises: []","tags: []"]}},{"name":"a","type":"skConst","line":6,"col":2,"code":"a = 1"},{"name":"b","type":"skConst","line":7,"col":2,"code":"b = \"test\""},{"name":"MyEnum","type":"skType","line":10,"col":10,"code":"MyEnum = enum\n  foo, bar"}]}

[ringabout]

#18256 seems to cause the regression