Do not swallow original error stack trace in box.js

box.js

@@ -35,6 +35,7 @@ async function setupNetworking() {
 // this is also used as the 'uncaughtException' handler which can only have synchronous functions
 function exitSync(status) {
     const ts = new Date().toISOString();
+    if (status.message) fs.write(logFd, `${ts} ${status.message}\n`, function () {});
     const msg = status.error.stack.replace(/\n/g, `\n${ts} `); // prefix each line with ts
     if (status.error) fs.write(logFd, `${ts} ${msg}\n`, function () {});
     fs.fsyncSync(logFd);
@@ -55,7 +56,7 @@ async function startServers() {
 
 async function main() {
     const [error] = await safe(startServers());
-    if (error) return exitSync({ error: new Error(`Error starting server: ${error.message}`), code: 1 });
+    if (error) return exitSync({ error, code: 1, message: 'Error starting servers' });
 
     // require this here so that logging handler is already setup
     const debug = require('debug')('box:box');
@@ -96,7 +97,7 @@ async function main() {
         }, 2000); // need to wait for the task processes to die
     });
 
-    process.on('uncaughtException', (error) => exitSync({ error, code: 1 }));
+    process.on('uncaughtException', (error) => exitSync({ error, code: 1, message: 'From uncaughtException handler.' }));
 }
 
 main();