From a63192852bf2f2d1b8a3b14fa4ea8f083742b0fa Mon Sep 17 00:00:00 2001
From: symwell <111290954+symwell@users.noreply.github.com>
Date: Mon, 12 Dec 2022 11:52:03 -0500
Subject: [PATCH] fix: Don't crash on an 'UNKNOWN: unknown error, lstat' error

---
 .../cli/src/fingerprint/fingerprintWatchCommand.ts   |  2 ++
 .../unit/fingerprint/fingerprintWatchCommand.spec.ts | 12 ++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/packages/cli/src/fingerprint/fingerprintWatchCommand.ts b/packages/cli/src/fingerprint/fingerprintWatchCommand.ts
index 6d7851efa3..d4bf07503d 100644
--- a/packages/cli/src/fingerprint/fingerprintWatchCommand.ts
+++ b/packages/cli/src/fingerprint/fingerprintWatchCommand.ts
@@ -52,6 +52,8 @@ export default class FingerprintWatchCommand {
       await this.watcher?.close();
       this.watcher = undefined;
       console.warn("File watching disabled.");
+    } else if (error.message.includes("UNKNOWN: unknown error, lstat")) {
+      console.warn(error.stack);
     } else {
       // let it crash if it's some other error, to learn what the error is
       throw error;
diff --git a/packages/cli/tests/unit/fingerprint/fingerprintWatchCommand.spec.ts b/packages/cli/tests/unit/fingerprint/fingerprintWatchCommand.spec.ts
index 37e51187f3..29d1bbbf8a 100644
--- a/packages/cli/tests/unit/fingerprint/fingerprintWatchCommand.spec.ts
+++ b/packages/cli/tests/unit/fingerprint/fingerprintWatchCommand.spec.ts
@@ -93,6 +93,18 @@ describe(FingerprintWatchCommand, () => {
       expect(cmd.watcher).toBeUndefined();
      });
 
+     it('does not raise on unknown error lstat', async () => {
+      cmd = new FingerprintWatchCommand(appMapDir);
+      cmd.watcher = new FSWatcher();
+      expect(cmd.watcher).not.toBeUndefined();
+      console.warn = jest.fn();
+      const errorMessage = "UNKNOWN: unknown error, lstat";
+      await cmd.watcherErrorFunction(new Error(errorMessage));
+      expect(cmd.watcher).not.toBeUndefined();
+      expect(console.warn).toBeCalledTimes(1);
+      expect(console.warn).toHaveBeenCalledWith(expect.stringContaining(errorMessage));
+    });
+
     describe('telemetry', () => {
       let handler: Fingerprinter;