TypeError: obj.hasOwnProperty is not a function

[balupton]

uncaughtException
TypeError: obj.hasOwnProperty is not a function
    at canonicalize (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/json.js:92:15)
    at canonicalize (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/json.js:99:32)
    at canonicalize (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/json.js:99:32)
    at Diff.jsonDiff.castInput (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/json.js:37:61)
    at Diff.diff (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/base.js:33:22)
    at diffJson (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/json.js:45:19)
    at diff (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/assert-helpers/edition-node-11/index.js:130:31)
    at compare (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/assert-helpers/edition-node-11/index.js:145:28)
    at logComparison (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/assert-helpers/edition-node-11/index.js:169:34)
    at equal (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/assert-helpers/edition-node-11/index.js:186:5)
------------------------------------
Comparison Error:
TypeError: obj.hasOwnProperty is not a function
    at canonicalize (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/json.js:92:15)
    at canonicalize (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/json.js:99:32)
    at canonicalize (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/json.js:99:32)
    at Diff.jsonDiff.castInput (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/json.js:37:61)
    at Diff.diff (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/base.js:33:22)
    at diffJson (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/diff/lib/diff/json.js:45:19)
    at diff (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/assert-helpers/edition-node-11/index.js:130:31)
    at compare (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/assert-helpers/edition-node-11/index.js:145:28)
    at logComparison (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/assert-helpers/edition-node-11/index.js:169:34)
    at equal (/Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/assert-helpers/edition-node-11/index.js:186:5)

Comparison Diff:
'Error: spawn /Users/balupton/Projects/batches/obligations/editions/safefps/node_modules/.bin/babel ENOENT\n' +
  '    at Process.ChildProcess._handle.onexit (internal/child_process.js:264:19)\n' +
  '    at onErrorNT (internal/child_process.js:456:16)\n' +
  '    at processTicksAndRejections (internal/process/task_queues.js:80:21)'

Comparison Actual:
'Error: spawn /Users/balupton/Projects/batches/obligations/editions/safeps/node_modules/.bin/babel ENOENT\n' +
  '    at Process.ChildProcess._handle.onexit (internal/child_process.js:264:19)\n' +
  '    at onErrorNT (internal/child_process.js:456:16)\n' +
  '    at processTicksAndRejections (internal/process/task_queues.js:80:21)'

Comparison Expected:
undefined