fix: fix apt-cache show and use gcc 11 on Ubuntu 20

cspell.config.yaml

@@ -12,6 +12,8 @@ ignorePaths:
 words:
   - aarch
   - clangd
+  - Trofimovich
+  - cobertura
   - aminya
   - applellvm
   - bazel

src/utils/setup/setupAptPack.ts

@@ -67,11 +67,15 @@ async function getAptArg(name: string, version: string | undefined) {
     if (stdout.trim() !== "") {
       return `${name}-${version}`
     } else {
+      try {
         // check if apt-get show can find the version
         const { stdout: showStdout } = await execa("apt-cache", ["show", `${name}=${version}`])
         if (showStdout.trim() === "") {
           return `${name}=${version}`
         }
+      } catch {
+        // ignore
+      }
       warning(`Failed to install ${name} ${version} via apt, trying without version`)
     }
   }

src/versions/default_versions.ts

@@ -36,7 +36,7 @@ export const DefaultVersions: Record<string, string> = {
 export const DefaultLinuxVersion: Record<string, Record<number, string>> = {
   gcc: {
     22: "13",
-    20: "13",
+    20: "11",
     18: "11",
     16: "11",
     14: "11",