component inspector: mergings.indexOf is not a function

Ember inspector is choking when opening the components tab. Does this error look familiar? Any tips if it is due to misconfiguration of my app?

Uncaught TypeError: mergings.indexOf is not a function
    at addNormalizedProperty (vendor.js:26525)
    at mergeMixins (vendor.js:26568)
    at applyMixin (vendor.js:26640)
    at Class.reopen (vendor.js:38658)
    at Class.retainObject (<anonymous>:2949:16)
    at Class.retainObject (<anonymous>:4642:42)
    at exports.default.inspectComponent (<anonymous>:1518:27)
    at <anonymous>:1329:34
    at Array.forEach (<anonymous>)
    at exports.default.componentsForController (<anonymous>:1321:18)

After it throws the error on the component tab, if I clear the console long and toggle back to say “routes” or “data”, then back to components, it doesn’t throw the error any longer and the components tab works.

Ember inspector version 3.8.0

App version: 3.8.1

[rwjblue]

@edeis53 - mergedProperties is a special property with special implementation details in Ember.Object (see the docs for details), if you are not trying to use that feature I’d suggest using a different property name is a good idea.

@rwwagner90 - mergedProperties is allowed to be null (which clobbers any merging behaviors), we should update the code in the inspector to handle null values (and add a test for it).

[rwwagner90]

Thanks @rwjblue! @nummi would you have some time to implement what Rob suggested, while I am away? I’m not able to do much until June 3rd.