Fixes #12360

src/bun.js/webcore/blob/WriteFile.zig

@@ -507,9 +507,11 @@ pub const WriteFileWindows = struct {
     fn onMkdirpComplete(this: *WriteFileWindows) void {
         this.event_loop.unrefConcurrently();
 
-        if (this.err) |err| {
-            this.throw(err);
-            bun.default_allocator.free(err.path);
+        const err = this.err;
+        this.err = null;
+        if (err) |err_| {
+            this.throw(err_);
+            bun.default_allocator.free(err_.path);
             return;
         }
 

test/regression/issue/012360.test.ts

@@ -0,0 +1,40 @@
+// https://github.com/oven-sh/bun/issues/12360
+import { test, expect } from "bun:test";
+import { fileURLToPath, pathToFileURL } from "bun";
+import { tmpdirSync } from "harness";
+import { join } from "path";
+
+export async function validatePath(path: URL): Promise<URL | string> {
+  const filePath = fileURLToPath(path);
+
+  if (await Bun.file(filePath).exists()) {
+    return pathToFileURL(filePath);
+  } else {
+    return "";
+  }
+}
+
+test("validate executable given in the config using `validatePath`: invalid value", async () => {
+  const dir = tmpdirSync();
+
+  const filePath = join(dir, "./sample.exe");
+
+  const newFilePath = await validatePath(pathToFileURL(filePath));
+
+  expect(newFilePath).toBe("");
+});
+
+test("validate executable given in the config using `validatePath`: expected real implementation", async () => {
+  const dir = tmpdirSync();
+  const editorPath: URL | string = pathToFileURL(join(dir, "./metaeditor64.exe"));
+  const terminalPath: URL | string = pathToFileURL(join(dir, "./terminal64.exe"));
+
+  await Bun.write(editorPath.pathname, "im a editor");
+  await Bun.write(terminalPath.pathname, "im a terminal");
+
+  const newEditorPath = <URL>await validatePath(editorPath);
+  const newTerminalPath = <URL>await validatePath(terminalPath);
+
+  expect(newEditorPath.pathname).toBe(editorPath.pathname);
+  expect(newTerminalPath.pathname).toBe(terminalPath.pathname);
+});