diff --git a/src/components/Sidebar.astro b/src/components/Sidebar.astro
index 9fdbfbc..62aac52 100644
--- a/src/components/Sidebar.astro
+++ b/src/components/Sidebar.astro
@@ -5,6 +5,9 @@ const entry: PageEntry = Astro.props.entry;
 const basePath: string = Astro.props.basePath;
 
 const entryPath = entry.path === "index"? "": entry.path;
+
+const entryUrl = basePath + entryPath + (entryPath.endsWith("/")? "" : "/");
+
 ---
 
 {
@@ -12,7 +15,7 @@ const entryPath = entry.path === "index"? "": entry.path;
         <li>
             <a
                 class="inline-block rounded-2xl w-full hover:bg-neutral-200 dark:hover:bg-neutral-800 transition-colors px-3 py-2"
-                href={`${basePath}${entryPath}`}
+                href={entryUrl}
             >
                 {entry.title}
             </a>
diff --git a/src/layouts/PagesLayout.astro b/src/layouts/PagesLayout.astro
index e022d31..41c5b16 100644
--- a/src/layouts/PagesLayout.astro
+++ b/src/layouts/PagesLayout.astro
@@ -76,7 +76,7 @@ for (const entry of pagesIndex) {
     <div class="lg:grid lg:grid-cols-[14rem_auto_12rem] lg:container mx-auto">
         <div
             id="sidebar"
-            class="pt-12 h-screen lg:sticky top-0 fixed z-10 bg-c-bg w-60 lg:w-auto border-r-2 lg:border-0 
+            class="pt-12 h-screen lg:sticky top-0 fixed z-10 bg-c-bg w-60 lg:w-auto border-r-2 lg:border-0
                 border-c-border-1 -translate-x-64 lg:translate-x-0 transition-transform"
         >
             <nav class="py-4 pr-2 overflow-x-scroll h-[calc(100vh-3rem)]">
@@ -88,7 +88,9 @@ for (const entry of pagesIndex) {
             </nav>
         </div>
 
-        <main class="py-[3.5rem] lg:pl-12 lg:pr-4 markdown min-w-0 small-container mx-auto">
+        <main
+            class="py-[3.5rem] lg:pl-12 lg:pr-4 markdown min-w-0 small-container mx-auto"
+        >
             <slot />
         </main>
 
@@ -133,7 +135,8 @@ for (const entry of pagesIndex) {
         document.addEventListener("DOMContentLoaded", () => {
             let current_uri = window.location.pathname;
 
-            const sidebar = document.getElementById("sidebar")!;
+            const sidebar = document.getElementById("sidebar")!.children[0]! as HTMLElement;
+            console.log(sidebar);
             const links = sidebar.querySelectorAll("a");
             for (const link of [...links]) {
                 if (link.getAttribute("href") === current_uri) {
diff --git a/src/lexer/number_lexer.ts b/src/lexer/number_lexer.ts
index 0d04620..425b372 100644
--- a/src/lexer/number_lexer.ts
+++ b/src/lexer/number_lexer.ts
@@ -21,7 +21,7 @@ function scan_decimal(input: string, starting_position: number): [string, number
     let pos = starting_position;
 
     while (pos < input.length) {
-        const c = input[pos];
+        const c = input[pos]!;
 
         if (c === ".") {
             // todo
diff --git a/src/pages/learn/error-handling/try.md b/src/pages/learn/error-handling/try.md
index 611c435..c760e10 100644
--- a/src/pages/learn/error-handling/try.md
+++ b/src/pages/learn/error-handling/try.md
@@ -144,6 +144,10 @@ fun sample(Int x)
 
         0.0
     }
+    catch Exception e
+    { ... }
+    catch Error e
+    { ... }
 }
 ```