TypeError: Object.keys called on non-object
at Function.keys (native)
at _testSubtree (/home/tjwebb/workspace/xtuple/xtuple/node-datasource/lib/query/node_modules/congruence/congruence.js:31:22)
at congruence.isDefined (/home/tjwebb/workspace/xtuple/xtuple/node-datasource/lib/query/node_modules/congruence/congruence.js:50:17)
at Array.every (native)
at Function._.every._.all (/home/tjwebb/workspace/xtuple/xtuple/node-datasource/lib/query/node_modules/underscore/underscore.js:193:62)
at _testSubtree (/home/tjwebb/workspace/xtuple/xtuple/node-datasource/lib/query/node_modules/congruence/congruence.js:36:14)
at Function.test (/home/tjwebb/workspace/xtuple/xtuple/node-datasource/lib/query/node_modules/congruence/congruence.js:92:12)
Should not be possible to cause this error