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Properly guard for undefined in getTypeReferenceArity

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Anders Hejlsberg
2016-08-22 09:49:26 -07:00
parent 2e8d11e9c0
commit 4e56fc0d27
1 changed files with 1 additions and 1 deletions
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src/compiler/checker.ts
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@@ -4979,7 +4979,7 @@ namespace ts {
}
function getTypeReferenceArity(type: TypeReference): number {
return type.target.typeParameters.length;
return type.target.typeParameters ? type.target.typeParameters.length : 0;
}
// Get type from reference to class or interface