2.5.14 introduces TypeError bind is not a function

[rjoo]

Version

2.5.14

Reproduction link

https://jsfiddle.net/bad4a8mb/1/

Steps to reproduce

Provide a non function to the bind utility method.

What is expected?

In <= 2.5.13, it rendered but failed silently: https://jsfiddle.net/ujxu9mvd/. Not sure if we'd want to keep that expectation, but existing projects will fail to render completely. A dev-mode warning at the very least will be helpful in identifying the issue.

What is actually happening?

Uncaught TypeError

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The refactoring of the bind method to use the native bind, exposes a coding error when upgrading from 2.5.13. We have a fairly large codebase and one of the developers mistakenly added an object as a component method (eg. a global Vue events instance). It made its way into production and worked fine until upgrading to 2.5.14. It took a while to find it as there was no clear indication as to where the error was happening.

Some other devs experienced this as well:
#7491
324672a

[posva]

A warning in dev mode would be fine

[thedamon]

This was a weird one to track down! We had a js file being destructured into a mixin, but one of the exports was an array.