Cannot invoke "org.eclipse.jdt.internal.compiler.ast.TypeReference.getTypeName()" because "argument.type" is null

i'm randomly getting this exceptions when attempt to find implementation / usages.
for most it works for rest it fails

```
Jan 04, 2026 6:19:02 PM org.eclipse.lsp4j.jsonrpc.RemoteEndpoint fallbackResponseError
SEVERE: Internal error: java.lang.NullPointerException: Cannot invoke "org.eclipse.jdt.internal.compiler.ast.TypeReference.getTypeName()" because "argument.type" is null
java.util.concurrent.CompletionException: java.lang.NullPointerException: Cannot invoke "org.eclipse.jdt.internal.compiler.ast.TypeReference.getTypeName()" because "argument.type" is null
at java.base/java.util.concurrent.CompletableFuture.wrapInCompletionException(CompletableFuture.java:323)
at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:359)
at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:364)
at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:670)
at java.base/java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:504)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:511)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1450)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:2019)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:187)
Caused by: java.lang.NullPointerException: Cannot invoke "org.eclipse.jdt.internal.compiler.ast.TypeReference.getTypeName()" because "argument.type" is null
at org.eclipse.jdt.internal.compiler.parser.RecoveredMethod.updateFromParserState(RecoveredMethod.java:521)
at org.eclipse.jdt.internal.compiler.parser.Parser.updateRecoveryState(Parser.java:13174)
at org.eclipse.jdt.internal.compiler.parser.Parser.resumeOnSyntaxError(Parser.java:13088)
at org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:11637)
at org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:12005)
at org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:11946)
at org.eclipse.jdt.internal.compiler.parser.Parser.dietParse(Parser.java:10333)
at org.eclipse.jdt.internal.core.search.matching.MatchLocator.parseAndBuildBindings(MatchLocator.java:1959)
at org.eclipse.jdt.internal.core.search.matching.MatchLocator.locateMatchesDefaultImpl(MatchLocator.java:1296)
at org.eclipse.jdt.internal.core.search.matching.MatchLocator.locateMatches(MatchLocator.java:1279)
at org.eclipse.jdt.internal.core.search.matching.MatchLocator.locateMatches(MatchLocator.java:1397)
at org.eclipse.jdt.internal.core.search.matching.MatchLocator.locateMatches(MatchLocator.java:1518)
at org.eclipse.jdt.internal.core.search.JavaSearchParticipant.locateMatches(JavaSearchParticipant.java:143)
at org.eclipse.jdt.internal.core.search.BasicSearchEngine.findMatches(BasicSearchEngine.java:278)
at org.eclipse.jdt.internal.core.search.BasicSearchEngine.search(BasicSearchEngine.java:622)
at org.eclipse.jdt.core.search.SearchEngine.search(SearchEngine.java:677)
at org.eclipse.jdt.internal.corext.callhierarchy.CallerMethodWrapper.findChildren(CallerMethodWrapper.java:155)
at org.eclipse.jdt.internal.corext.callhierarchy.MethodWrapper.performSearch(MethodWrapper.java:265)
at org.eclipse.jdt.internal.corext.callhierarchy.MethodWrapper.doFindChildren(MethodWrapper.java:196)
at org.eclipse.jdt.internal.corext.callhierarchy.MethodWrapper.getCalls(MethodWrapper.java:87)
at org.eclipse.jdt.ls.core.internal.handlers.CallHierarchyHandler.getIncomingCallItemsAt(CallHierarchyHandler.java:201)
at org.eclipse.jdt.ls.core.internal.handlers.CallHierarchyHandler.callHierarchyIncomingCalls(CallHierarchyHandler.java:115)
at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$55(JDTLanguageServer.java:1197)
at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$63(JDTLanguageServer.java:1256)
at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:667)
... 5 more
```

this is duplicate of [https://github.com/eclipse-jdtls/eclipse.jdt.ls/issues/3657](url)