typeError - cannot read property 'line' of undefined

[li-boxuan]

I am using graphql-client to fetch data from GitHub.

Usually, errors returned from GitHub looks like this:

[{"message":"Could not resolve to an Organization with the login of 'GCI-AOSSIE'.","type":"NOT_FOUND","path":["organization"],"locations":[{"line":2,"column":3}]}]

However, sometimes GitHub returns errors as follows:

[{"message":"Something went wrong while executing your query. This may be the result of a timeout, or it could be a GitHub bug. Please include `E689:1AF6:67E816:BAAF4C:5BD321E1` when reporting this issue."}]

Note that it doesn't have locations field.
Under the latter circumstance,

graphql-client/index.js

Line 2 in f8d1dcb

var locations = errors.map(function (e) { return e.locations })

together with

graphql-client/index.js

Line 11 in f8d1dcb

var lineErrors = locations.filter(function (loc) { return loc && loc.line === line })

would cause an error: cannot read property 'line' of undefined

c.f. coala/gci-leaders#161 (comment)