fix: handle VFS-incompatible fs calls in SEA bootstrap

Two fixes for the SEA runtime bootstrap: 1. Replace fs.copyFileSync with readFileSync+writeFileSync in the dlopen patch's cpRecursive helper. copyFileSync is not routed through the VFS in overlay mode, causing ENOENT when extracting native addon packages from the snapshot. 2. Wrap fs.realpathSync in try-catch in the diagnostic dumpLevel function. realpathSync can fail on VFS paths, crashing the DEBUG_PKG tree dump. Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
yao-pkg · robertsLando · Apr 14, 2026 · Apr 7, 2026 · Apr 7, 2026 · Apr 7, 2026
commit 2801ce4252425a1b53770ee852cd8522db6c9f2a
diff --git a/prelude/bootstrap-shared.js b/prelude/bootstrap-shared.js
@@ -72,7 +72,9 @@ function patchDlopen(insideSnapshot) {
                 );
               }
             } else {
-              fs.copyFileSync(src, dest);
+              // Use readFileSync+writeFileSync instead of copyFileSync because
+              // copyFileSync may not be routed through the VFS in SEA mode.
+              fs.writeFileSync(dest, fs.readFileSync(src));
             }
           })(modulePkgFolder, destFolder);
         }
@@ -307,7 +309,12 @@ function installDiagnostic(snapshotPrefix) {
     var d = fs.readdirSync(filename);
     for (var j = 0; j < d.length; j += 1) {
       var f = path.join(filename, d[j]);
-      var realPath = fs.realpathSync(f);
+      var realPath;
+      try {
+        realPath = fs.realpathSync(f);
+      } catch (_) {
+        realPath = f;
+      }
       var isSymbolicLink = f !== realPath;
 
       var s = fs.statSync(f);