An error occurs when passing the SourceFile node to getTypeAtLocation.

[cy-hub-cloud]

🔎 Search Terms

getTypeAtLocation && SourceFile

🕗 Version & Regression Information

• This changed between versions ______ and _______
• This changed in commit or PR _______
• This is the behavior in every version I tried, and I reviewed the FAQ for entries about _________
• I was unable to test this on prior versions because _______

⏯ Playground Link

No response

💻 Code

//ModuleA
export let namedOther = null;
//ModuleB
import  * as testNs from './ModuleA';
export { testNs };

🙁 Actual behavior

In the statement 'export { testNs }', call getTypeAtLocation on 'testNs' to retrieve its type.

🙂 Expected behavior

It is expected to obtain the returned type, whether the result is errorType or another type, but in reality, an error 'Cannot read properties of undefined (reading 'kind')' will be reported in getTypeAtLocation#getTypeOfNode#isDeclarationNameOrImportPropertyName.

Additional information about the issue

The getTypeOfNode function supports passing a SourceFile node, but if the condition isExternalModule is not met, the SourceFile node will proceed to execute further.

When executing the isDeclarationNameOrImportPropertyName method, the passed node is still the SourceFile node, and an error is directly reported at name.parent.

No response

[DanielRosenwasser]

We need a minimal repro, but that needs to include API usage. So we need an example of what you're doing with the API.

[cy-hub-cloud]

We need a minimal repro, but that needs to include API usage. So we need an example of what you're doing with the API.

// demo
// ModuleA.ts
export let namedOther = null;

// ModuleB.ts
import  * as testNs from './ModuleA';
export { testNs };

The expectation is to obtain the type of 'testNs' from the 'export { testNs }' statement.
First, the symbol of testNs is retrieved through the getAliasedSymbol interface,
then Symbol.declarations[0] is obtained from the symbol, which actually gets the SourceFile node of ModuleA.ts.
Finally, the type of the SourceFile node is obtained by calling getTypeAtLocation, but an error occurs at getTypeAtLocation#getTypeOfNode#isDeclarationNameOrImportPropertyName.