{"action":"created","comment":{"url":"https://api.github.com/repos/realm/realm-java/pulls/comments/93368592","pull_request_review_id":13893967,"id":93368592,"diff_hunk":"@@ -31,11 +31,15 @@ Java_io_realm_RealmFileUserStore_nativeGetCurrentUser (JNIEnv *env, jclass)\n {\n     TR_ENTER()\n     try {\n-\n-        const std::shared_ptr<SyncUser> &user = SyncManager::shared().get_current_user();\n-        if (user) {\n-            return to_jstring(env, user->refresh_token().data());\n-        } else {\n+        try {\n+            const std::shared_ptr<SyncUser> &user = SyncManager::shared().get_current_user();\n+            if (user) {\n+                return to_jstring(env, user->refresh_token().data());\n+            } else {\n+                return nullptr;\n+            }\n+        } catch (std::logic_error e) {\n+            ThrowException(env, IllegalState, \"Multiple users have been logged in. `currentUser` is only valid if one single user is logged in.\");","path":"realm/realm-library/src/main/cpp/io_realm_RealmFileUserStore.cpp","position":17,"original_position":17,"commit_id":"103681168520bee4f426ee2c2f76d5dc6be6d7ce","original_commit_id":"103681168520bee4f426ee2c2f76d5dc6be6d7ce","user":{"login":"beeender","id":449296,"avatar_url":"https://avatars.githubusercontent.com/u/449296?v=3","gravatar_id":"","url":"https://api.github.com/users/beeender","html_url":"https://github.com/beeender","followers_url":"https://api.github.com/users/beeender/followers","following_url":"https://api.github.com/users/beeender/following{/other_user}","gists_url":"https://api.github.com/users/beeender/gists{/gist_id}","starred_url":"https://api.github.com/users/beeender/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/beeender/subscriptions","organizations_url":"https://api.github.com/users/beeender/orgs","repos_url":"https://api.github.com/users/beeender/repos","events_url":"https://api.github.com/users/beeender/events{/privacy}","received_events_url":"https://api.github.com/users/beeender/received_events","type":"User","site_admin":false},"body":"The OS has sent a quite meaningful exception message:\r\n```c++\r\nif (std::find_if(std::next(it), m_users.end(), is_active_user) != m_users.end()) {\r\n        throw std::logic_error(\"Current user is not valid if more that one valid, logged-in user exists.\");\r\n```\r\n\r\nDo we really need to rephrase it? Or the exception message in the OS should be changed directly.","created_at":"2016-12-21T03:22:38Z","updated_at":"2016-12-21T03:22:47Z","html_url":"https://github.com/realm/realm-java/pull/3921#discussion_r93368592","pull_request_url":"https://api.github.com/repos/realm/realm-java/pulls/3921","_links":{"self":{"href":"https://api.github.com/repos/realm/realm-java/pulls/comments/93368592"},"html":{"href":"https://github.com/realm/realm-java/pull/3921#discussion_r93368592"},"pull_request":{"href":"https://api.github.com/repos/realm/realm-java/pulls/3921"}}},"pull_request":{"url":"https://api.github.com/repos/realm/realm-java/pulls/3921","id":98466801,"html_url":"https://github.com/realm/realm-java/pull/3921","diff_url":"https://github.com/realm/realm-java/pull/3921.diff","patch_url":"https://github.com/realm/realm-java/pull/3921.patch","issue_url":"https://api.github.com/repos/realm/realm-java/issues/3921","number":3921,"state":"open","locked":false,"title":"Throw correct exception for 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