From 818affc3593e9beb58d54a03a62197280d3624bc Mon Sep 17 00:00:00 2001
From: Kevin Stillhammer <kevin.stillhammer@gmail.com>
Date: Sun, 31 May 2026 11:25:35 +0200
Subject: [PATCH] fix: report unexpected cache save failures (#896)

## Summary
- add top-level uncaughtException and unhandledRejection handlers for
the save-cache entrypoint
- report unexpected post-action failures through core.setFailed with
stack/context
- regenerate the committed save-cache bundle
---
 dist/save-cache/index.cjs | 16 ++++++++++++++++
 src/save-cache.ts         | 20 ++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/dist/save-cache/index.cjs b/dist/save-cache/index.cjs
index d6ee52d..4e73da0 100644
--- a/dist/save-cache/index.cjs
+++ b/dist/save-cache/index.cjs
@@ -63211,6 +63211,22 @@ function getResolutionStrategy() {
 }
 
 // src/save-cache.ts
+function formatUnexpectedFailure(error2) {
+  if (error2 instanceof Error) {
+    return error2.stack ?? error2.message;
+  }
+  return String(error2);
+}
+function failUnexpectedly(event, error2) {
+  setFailed(`${event}: ${formatUnexpectedFailure(error2)}`);
+  process.exit(1);
+}
+process.on("uncaughtException", (error2) => {
+  failUnexpectedly("Uncaught exception", error2);
+});
+process.on("unhandledRejection", (reason) => {
+  failUnexpectedly("Unhandled promise rejection", reason);
+});
 async function run() {
   try {
     const inputs = loadInputs();
diff --git a/src/save-cache.ts b/src/save-cache.ts
index 366ae69..c957ff4 100644
--- a/src/save-cache.ts
+++ b/src/save-cache.ts
@@ -11,6 +11,26 @@ import {
 import { STATE_UV_PATH, STATE_UV_VERSION } from "./utils/constants";
 import { loadInputs, type SetupInputs } from "./utils/inputs";
 
+function formatUnexpectedFailure(error: unknown): string {
+  if (error instanceof Error) {
+    return error.stack ?? error.message;
+  }
+  return String(error);
+}
+
+function failUnexpectedly(event: string, error: unknown): never {
+  core.setFailed(`${event}: ${formatUnexpectedFailure(error)}`);
+  process.exit(1);
+}
+
+process.on("uncaughtException", (error) => {
+  failUnexpectedly("Uncaught exception", error);
+});
+
+process.on("unhandledRejection", (reason) => {
+  failUnexpectedly("Unhandled promise rejection", reason);
+});
+
 export async function run(): Promise<void> {
   try {
     const inputs = loadInputs();