diff --git a/os-checks/pages/index.vue b/os-checks/pages/index.vue
index 75a2a0b..57f29f3 100644
--- a/os-checks/pages/index.vue
+++ b/os-checks/pages/index.vue
@@ -265,7 +265,7 @@ $fetch(docs_json_url).then(val => docs.value = val);
 
 const summaryTable = computed<SummaryTable[]>(() => {
   const value = summaries.value.map(val => {
-    return Object.entries(val.pkgs).map(([name, pkg]) => {
+    return Object.entries(val.pkgs ?? {}).map(([name, pkg]) => {
       let testcases_color = null;
       if (pkg.testcases?.pkg_tests_count) {
         if (pkg.testcases?.failed === 0) {
@@ -457,7 +457,7 @@ watch(selectedPkg, val => {
 
   const pkg = summaries.value
     .find(summary => summary.user === val.user && summary.repo === val.repo)
-    ?.pkgs[val.pkg];
+    ?.pkgs?.[val.pkg];
 
   if (!pkg) { return; }
 
diff --git a/os-checks/shared/info.ts b/os-checks/shared/info.ts
index 94aff69..f2fd3db 100644
--- a/os-checks/shared/info.ts
+++ b/os-checks/shared/info.ts
@@ -3,7 +3,16 @@ import { type Col, Cols } from "./columns-select"
 export type PkgInfo = {
   user: string,
   repo: string,
-  pkgs: { [key: string]: Pkg }
+  timestamp: TimeStamp,
+  // good repo: pkgs and err are exclusive
+  pkgs?: { [key: string]: Pkg },
+  // compilation error
+  err?: string,
+}
+
+export type TimeStamp = {
+  start: number,
+  end: number,
 }
 
 export type Pkg = {
@@ -58,12 +67,12 @@ export type TestCase = {
 }
 
 export function unique_field(summaries: PkgInfo[], cb: (_: Pkg) => string[]): string[] {
-  const arr = summaries.map(s => Object.values(s.pkgs).map(pkg => cb(pkg).flat()).flat()).flat();
+  const arr = summaries.map(s => Object.values(s.pkgs ?? {}).map(pkg => cb(pkg).flat()).flat()).flat();
   return [...new Set(arr)].sort();
 }
 
 export function unique_field_bool(summaries: PkgInfo[], cb: (_: Pkg) => boolean): boolean {
-  const arr = summaries.filter(s => Object.values(s.pkgs).filter(cb).length > 0)
+  const arr = summaries.filter(s => Object.values(s.pkgs ?? {}).filter(cb).length > 0)
   return arr.length > 0;
 }
 
diff --git a/os-checks/shared/testcases.ts b/os-checks/shared/testcases.ts
index 462c22c..525a12d 100644
--- a/os-checks/shared/testcases.ts
+++ b/os-checks/shared/testcases.ts
@@ -102,7 +102,7 @@ export function summariesToTestResult(pkg_info: PkgInfo[]): TestResult[] {
   let idx = 0;
 
   for (const info of pkg_info) {
-    for (const [pkg, value] of Object.entries(info.pkgs)) {
+    for (const [pkg, value] of Object.entries(info.pkgs ?? {})) {
       for (const test of value.testcases?.tests || []) {
         for (const testcase of test.testcases) {
           result.push({