Raise on error result read_each

Author: noteflakes

ext/um/um.c

@@ -630,12 +630,9 @@ VALUE read_recv_each_begin(VALUE arg) {
     int more = false;
     struct um_op_result *result = &ctx->op->result;
     while (result) {
-      more = (result->flags & IORING_CQE_F_MORE);
-      if (result->res < 0) {
-        um_op_multishot_results_clear(ctx->machine, ctx->op);
-        return Qnil;
-      }
+      um_raise_on_error_result(result->res);
 
+      more = (result->flags & IORING_CQE_F_MORE);
       if (!read_recv_each_multishot_process_result(ctx, result, &total))
         return Qnil;
 

test/test_um.rb

@@ -377,6 +377,15 @@ def test_read_each_break
   ensure
     t&.kill
   end
+
+  def test_read_each_bad_file
+    r, w = IO.pipe
+    bgid = machine.setup_buffer_ring(4096, 1024)
+
+    assert_raises(Errno::EBADF) do
+      machine.read_each(w.fileno, bgid)
+    end
+  end
 end
 
 class WriteTest < UMBaseTest