Final touches

Author: gabro

src/rules/no-discarded-pure-expression.ts

@@ -39,7 +39,7 @@ export default createRule({
         pipe(
           pureDataPrefixes,
           array.some((prefix) =>
-            t.symbol.escapedName.toString().startsWith(prefix)
+            t.symbol?.escapedName.toString().startsWith(prefix)
           )
         )
       );

src/utils.ts

@@ -399,7 +399,11 @@ export const contextUtils = <
   }
 
   function parserServices(): Option<ParserServices> {
-    return pipe(context.parserServices, option.fromNullable);
+    return pipe(
+      context.parserServices,
+      option.fromNullable,
+      option.filter((parserServices) => parserServices.hasFullTypeInformation)
+    );
   }
 
   function typeOfNode(node: TSESTree.Node): Option<ts.Type> {