fix segfault when called from older version (#9880)

adameat · web-flow · commit ea6dfccfc5af · 2024-09-30T09:36:10.000Z
diff --git a/ydb/core/viewer/viewer_autocomplete.h b/ydb/core/viewer/viewer_autocomplete.h
@@ -270,7 +270,9 @@ class TJsonAutocomplete : public TViewerPipeClient {
     }
 
     void ReplyAndPassAway() override {
-        Result.SetVersion(Viewer->GetCapabilityVersion("/viewer/autocomplete"));
+        if (Viewer) {
+            Result.SetVersion(Viewer->GetCapabilityVersion("/viewer/autocomplete"));
+        }
 
         if (CacheResult) {
             if (CacheResult->IsOk()) {

Original file line number	Diff line number	Diff line change
`@@ -270,7 +270,9 @@ class TJsonAutocomplete : public TViewerPipeClient {`
`270`	`270`	`}`
`271`	`271`
`272`	`272`	`void ReplyAndPassAway() override {`
`273`		`- Result.SetVersion(Viewer->GetCapabilityVersion("/viewer/autocomplete"));`
	`273`	`+ if (Viewer) {`
	`274`	`+ Result.SetVersion(Viewer->GetCapabilityVersion("/viewer/autocomplete"));`
	`275`	`+ }`
`274`	`276`
`275`	`277`	`if (CacheResult) {`
`276`	`278`	`if (CacheResult->IsOk()) {`