Use concat instead of push around listFolders

This avoids stack overflows when using the spread operator on
directories that have many, many children.

lib/analyze-action.js

@@ -91,13 +91,13 @@ async function run() {
         const codeql = await (0, codeql_1.getCodeQL)(config.codeQLCmd);
         if (config.debugMode) {
             // Upload the logs as an Actions artifact for debugging
-            const toUpload = [];
+            let toUpload = [];
             for (const language of config.languages) {
-                toUpload.push(...listFolder(path.resolve(util.getCodeQLDatabasePath(config, language), "log")));
+                toUpload = toUpload.concat(listFolder(path.resolve(util.getCodeQLDatabasePath(config, language), "log")));
             }
             if (await (0, util_1.codeQlVersionAbove)(codeql, codeql_1.CODEQL_VERSION_NEW_TRACING)) {
                 // Multilanguage tracing: there are additional logs in the root of the cluster
-                toUpload.push(...listFolder(path.resolve(config.dbLocation, "log")));
+                toUpload = toUpload.concat(listFolder(path.resolve(config.dbLocation, "log")));
             }
             await uploadDebugArtifacts(toUpload, config.dbLocation, config.debugArtifactName);
             if (!(await (0, util_1.codeQlVersionAbove)(codeql, codeql_1.CODEQL_VERSION_NEW_TRACING))) {
@@ -204,13 +204,13 @@ async function uploadDebugArtifacts(toUpload, rootDir, artifactName) {
 }
 function listFolder(dir) {
     const entries = fs.readdirSync(dir, { withFileTypes: true });
-    const files = [];
+    let files = [];
     for (const entry of entries) {
         if (entry.isFile()) {
             files.push(path.resolve(dir, entry.name));
         }
         else if (entry.isDirectory()) {
-            files.push(...listFolder(path.resolve(dir, entry.name)));
+            files = files.concat(listFolder(path.resolve(dir, entry.name)));
         }
     }
     return files;