diff --git a/src/runtime/webcore/Blob.zig b/src/runtime/webcore/Blob.zig
index 6cf5c0475545..344984fdfaff 100644
--- a/src/runtime/webcore/Blob.zig
+++ b/src/runtime/webcore/Blob.zig
@@ -2975,7 +2975,13 @@ pub fn getWriter(
 
     if (arguments.len > 0 and arguments.ptr[0].isObject()) {
         stream_start = try jsc.WebCore.streams.Start.fromJSWithTag(globalThis, arguments[0], .FileSink);
-        stream_start.FileSink.input_path = input_path;
+        if (stream_start == .err) {
+            sink.deref();
+            return globalThis.throwValue(try stream_start.err.toJS(globalThis));
+        }
+        if (stream_start == .FileSink) {
+            stream_start.FileSink.input_path = input_path;
+        }
     }
 
     switch (sink.start(stream_start)) {
diff --git a/test/js/bun/util/filesink.test.ts b/test/js/bun/util/filesink.test.ts
index 736e5b085731..df1ff5cbd8f2 100644
--- a/test/js/bun/util/filesink.test.ts
+++ b/test/js/bun/util/filesink.test.ts
@@ -219,6 +219,13 @@ if (isWindows) {
   });
 }
 
+it.skipIf(isWindows)("writer() with invalid path/fd options throws instead of crashing", () => {
+  const file = path.join(tmpdirSync(), "test.txt");
+  expect(() => Bun.file(file).writer({ path: 123 })).toThrow(expect.objectContaining({ code: "EINVAL" }));
+  expect(() => Bun.file(file).writer({ fd: "hello" })).toThrow(expect.objectContaining({ code: "EBADF" }));
+  expect(() => Bun.file(file).writer({ fd: 2 ** 53 })).toThrow(expect.objectContaining({ code: "EBADF" }));
+});
+
 // When a write to a pollable fd returns `.pending`, FileSink takes a
 // `must_be_kept_alive_until_eof` ref on itself so it survives until the
 // buffered data is drained. If the write later fails (e.g. EPIPE because the