`toString` does not work correctly on records with field named `ctor`

[jvoigtlaender]

On current http://elm-lang.org/try, the following program leads to a runtime error:

import Html

main = Html.text (toString { ctor = [0] })

whereas this related program works flawlessly:

import Html

main = Html.text (toString { field = [0] })

[process-bot]

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[process-bot]

Thanks for the issue! Make sure it satisfies this checklist. My human colleagues will appreciate it!

Here is what to expect next, and if anyone wants to comment, keep these things in mind.

[evancz]

Follow along in the #723 meta issue.

[evancz]

Follow along in the #723 meta issue.