1 files changed, 6 insertions, 2 deletions
diff --git a/web_src/js/features/repo-migration.ts b/web_src/js/features/repo-migration.ts
index 4914e47267..0b348b45fb 100644
--- a/web_src/js/features/repo-migration.ts
+++ b/web_src/js/features/repo-migration.ts
@@ -34,8 +34,12 @@ export function initRepoMigration() {
     elCloneAddr.addEventListener('input', () => {
       if (repoNameChanged) return;
       let repoNameFromUrl = elCloneAddr.value.split(/[?#]/)[0];
-      repoNameFromUrl = /^(.*\/)?((.+?)\/?)$/.exec(repoNameFromUrl)[3];
-      repoNameFromUrl = repoNameFromUrl.split(/[?#]/)[0];
+      const parts = /^(.*\/)?((.+?)\/?)$/.exec(repoNameFromUrl);
+      if (!parts || parts.length < 4) {
+        elRepoName.value = '';
+        return;
+      }
+      repoNameFromUrl = parts[3].split(/[?#]/)[0];
       elRepoName.value = sanitizeRepoName(repoNameFromUrl);
     });
   }