Fix extract type crash on unresolvable alias references #47136
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typescript-bot
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Author: Team
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RyanCavanaugh
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Dec 13, 2021
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@typescript-bot cherry-pick this to release-4.5 |
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Heya @DanielRosenwasser, I've started to run the task to cherry-pick this into |
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Hey @DanielRosenwasser, I've opened #47379 for you. |
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Component commits: e61702c Fix extract type crash
DanielRosenwasser
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Component commits: e61702c Fix extract type crash Co-authored-by: Andrew Branch <andrew@wheream.io>
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Fixes #32860
If you run
checker.resolveName("T", location, SymbolFlags.TypeParameter)and it returns a Symbol, you do not have a guarantee that you have a type parameter symbol. You might have an alias symbol that couldn’t be resolved.