<p dir="auto">Simple steps to reproduce:<br>
Run this script:</p>
<div class="highlight highlight-source-ts notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="function test(a: number, b: number): number{
    return a + b;
}
test(, 5);"><pre class="notranslate"><span class="pl-k">function</span> <span class="pl-en">test</span><span class="pl-kos">(</span><span class="pl-s1">a</span>: <span class="pl-smi">number</span><span class="pl-kos">,</span> <span class="pl-s1">b</span>: <span class="pl-smi">number</span><span class="pl-kos">)</span>: <span class="pl-smi">number</span><span class="pl-kos">{</span>
    <span class="pl-k">return</span> <span class="pl-s1">a</span> <span class="pl-c1">+</span> <span class="pl-s1">b</span><span class="pl-kos">;</span>
<span class="pl-kos">}</span>
<span class="pl-en">test</span><span class="pl-kos">(</span><span class="pl-kos">,</span> <span class="pl-c1">5</span><span class="pl-kos">)</span><span class="pl-kos">;</span></pre></div>
<p dir="auto">Then, after run, we receive empty error.</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="error: "><pre class="notranslate"><code class="notranslate">error: 
</code></pre></div>
<p dir="auto">With the following code I get almost no output.</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="import {
    serve,
} from &quot;https://deno.land/std/http/server.ts&quot;;
const s = serve({
    port: 8000
});

for await (const req of s) {
    let lolomo:
}"><pre class="notranslate"><code class="notranslate">import {
    serve,
} from "https://deno.land/std/http/server.ts";
const s = serve({
    port: 8000
});

for await (const req of s) {
    let lolomo:
}
</code></pre></div>
<p dir="auto">Here is me running the script</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="&gt; deno run -A index.ts
error: "><pre class="notranslate"><code class="notranslate">&gt; deno run -A index.ts
error: 
</code></pre></div>