Check for undefined source.symbol when elaborating unmatched properties
#37021
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DanielRosenwasser
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weswigham
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@typescript-bot cherry-pick this to release-3.8 |
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Heya @RyanCavanaugh, I've started to run the task to cherry-pick this into |
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Component commits: 864c2d4 Check for undefined `source.symbol` Fixes microsoft#37014
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Hey @RyanCavanaugh, I've opened #37025 for you. |
a-tarasyuk
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| @@ -16239,6 +16239,7 @@ namespace ts { | |||
| if (unmatchedProperty.valueDeclaration | |||
| && isNamedDeclaration(unmatchedProperty.valueDeclaration) | |||
| && isPrivateIdentifier(unmatchedProperty.valueDeclaration.name) | |||
| && source.symbol | |||
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source uses the type Type. Based on the Type definition property symbol cannot be undefined.
TypeScript/src/compiler/types.ts
Line 4365 in 56b6d0d
Are there are other cases when symbol can be undefined? Maybe make sense to change type definition from symbol: Symbol; to symbol: Symbol | undefined in order to avoid such bugs?
What do you @DanielRosenwasser @RyanCavanaugh @weswigham think?
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Fixes #37014