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What does this PR do?
Fixes #10660, a crash impacting Next.js dev server while reading files.
To make better panics, I'm introducing two new functions:
unexpectedTag
, for use in a switchelse => |t| unexpectedTag
releaseNonNull
, named after the method of the same name in WebKit'sRef
. This is a release-mode safety checked version of.?
and should be used if one is not confidentThis fixes the test locally for me, but I don't think it will fix CI as CI was running into a different test failure.