Closed
Description
Attempting to ts.transpile
this async generator
async function*(f) { yield f; }
throws
TypeError: Cannot read property 'members' of undefined
at resolveDeclaredMembers (D:\repos\TypeScript\built\local\typescript.js:15456:65)
at resolveTypeReferenceMembers (D:\repos\TypeScript\built\local\typescript.js:15486:26)
at resolveStructuredTypeMembers (D:\repos\TypeScript\built\local\typescript.js:15705:21)
at getPropertiesOfObjectType (D:\repos\TypeScript\built\local\typescript.js:15713:24)
at propertiesRelatedTo (D:\repos\TypeScript\built\local\typescript.js:17272:34)
at objectTypeRelatedTo (D:\repos\TypeScript\built\local\typescript.js:17238:30)
at isRelatedTo (D:\repos\TypeScript\built\local\typescript.js:17062:34)
at checkTypeRelatedTo (D:\repos\TypeScript\built\local\typescript.js:16929:26)
at checkTypeAssignableTo (D:\repos\TypeScript\built\local\typescript.js:16902:20)
at isTypeAssignableTo (D:\repos\TypeScript\built\local\typescript.js:16896:20)
annotating the generator return value in any way causes the exception to not be thrown. This also only happens when the async generator is anonymous.
I know that async generators aren't technically valid JS, but attempting to transpile one probably shouldn't throw.