Gatsby image crashes with unhelpful message if not passed any parameters

[ehrencrona]

Description

Including a Gatsby image on a page without any parameters, like so <Img />, crashes the page at runtime with the error message TypeError: Cannot read property '0' of undefined.

I came across this in a Stackoverflow question

Steps to reproduce

Create a new site using gatsby new site, change <Img fluid={data.placeholderImage.childImageSharp.fluid} /> in src/components/image.js to <Img/>

Expected result

I'd expect the image not to render and possibly an error to be printed on the console.

Actual result

Page crashes as per above.

Environment

  System:
    OS: Linux 4.19 Debian GNU/Linux 10 (buster) 10 (buster)
    CPU: (8) x64 Intel(R) Xeon(R) CPU @ 2.30GHz
    Shell: 5.0.3 - /bin/bash
  Binaries:
    Node: 14.4.0 - /usr/bin/node
    Yarn: 1.22.4 - /usr/bin/yarn
    npm: 6.14.5 - /usr/bin/npm
  Languages:
    Python: 2.7.16 - /usr/bin/python

(Gatsby version corresponds to master built from source)