test: warn when inspector process crashes

If the subprocess being inspected hard crashes, there will be no
information on the log, and the parent process will just wait until
timeout. Logging the error signal when it happens can help developers
understand failures faster.

Signed-off-by: Matheus Marchini <[email protected]>

PR-URL: #32133
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Jiawen Geng <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: mmarchini

test/common/inspector-helper.js

@@ -344,6 +344,9 @@ class NodeInstance extends EventEmitter {
 
     this._shutdownPromise = new Promise((resolve) => {
       this._process.once('exit', (exitCode, signal) => {
+        if (signal) {
+          console.error(`[err] child process crashed, signal ${signal}`);
+        }
         resolve({ exitCode, signal });
         this._running = false;
       });