`bun run` fix missing script error on empty file (#5025)

* Fix empty file not found bug

* Add tests

* fix test

---------

Co-authored-by: Jeremy Funk <jeremy@kombo.dev>
Co-authored-by: dave caruso <me@paperdave.net>

3 files changed, 15 insertions, 1 deletions

diff --git a/src/cli/run_command.zig b/src/cli/run_command.zig
index 3ef68b494..f31520cc8 100644
--- a/src/cli/run_command.zig
+++ b/src/cli/run_command.zig
@@ -973,7 +973,6 @@ pub const RunCommand = struct {
                         var shebang: string = shebang_buf[0..shebang_size];
 
                         shebang = std.mem.trim(u8, shebang, " \r\n\t");
-                        if (shebang.len == 0) break :possibly_open_with_bun_js;
                         if (strings.hasPrefixComptime(shebang, "#!")) {
                             const first_arg: string = if (bun.argv().len > 0) bun.span(bun.argv()[0]) else "";
                             const filename = std.fs.path.basename(first_arg);
diff --git a/test/cli/run/empty-file.js b/test/cli/run/empty-file.js
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/test/cli/run/empty-file.js
diff --git a/test/cli/run/empty-file.test.ts b/test/cli/run/empty-file.test.ts
new file mode 100644
index 000000000..f29162bf7
--- /dev/null
+++ b/test/cli/run/empty-file.test.ts
@@ -0,0 +1,15 @@
+import { it, expect } from "bun:test";
+import { bunEnv, bunExe } from "harness";
+import { join } from "path";
+
+it("should execute empty scripts", () => {
+  const { stdout, stderr, exitCode } = Bun.spawnSync({
+    cmd: [bunExe(), "run", "--bun", join(import.meta.dir, "empty-file.js")],
+    env: bunEnv,
+    stdout: "pipe",
+    stderr: "pipe",
+  });
+  expect(stdout.toString()).toBeEmpty();
+  expect(stderr.toString()).toBeEmpty();
+  expect(exitCode).toBe(0);
+});