build: avoid swallowing module not found exception

Author: clydin

lib/bootstrap-local.js

@@ -119,9 +119,12 @@ if (!__dirname.match(new RegExp(`\\${path.sep}node_modules\\${path.sep}`))) {
 
   Module._resolveFilename = function (request, parent) {
     let resolved = null;
+    let exception;
     try {
       resolved = oldResolve.call(this, request, parent);
-    } catch (_) {}
+    } catch (e) {
+      exception = e;
+    }
 
     if (request in packages) {
       return packages[request].main;
@@ -135,6 +138,12 @@ if (!__dirname.match(new RegExp(`\\${path.sep}node_modules\\${path.sep}`))) {
       if (match) {
         const p = path.join(packages[match].root, request.substr(match.length));
         return oldResolve.call(this, p, parent);
+      } else if (!resolved) {
+        if (exception) {
+          throw exception;
+        } else {
+          return resolved;
+        }
       } else {
         // Because loading `.ts` ends up AFTER `.json` in the require() logic, requiring a file that has both `.json`
         // and `.ts` versions will only get the `.json` content (which wouldn't happen if the .ts was compiled to