Tolerate missing or falsey substitutions #8907
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Previously the `getMessage` function would throw if a substitution was falsey. Now it will accept any substitution, including `undefined`. A substitution of `null` or `undefined` will still be reported to Sentry and printed to the console as an error, but it will not interrupt execution. Any `null` or `undefined` substitutions will be rendered as empty strings. Ideally we'd never pass in `null` or `undefined` as a substitution, but in practice this sometimes just occurs breifly between renders, which isn't a severe enough problem to justify crashing the UI. The detection of React component substitutions has been updated as well, to ensure that `null` values aren't counted as React substitutions.
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Previously the
getMessagefunction would throw if a substitution was falsey. Now it will accept any substitution, includingnullandundefined.A substitution of
nullorundefinedwill still be reported to Sentry and printed to the console as an error, but it will not interrupt execution. There are a few cases whereundefinedis shown briefly in-between renders, and we don't want to crash the UI for such a minor problem.