safari点击存储时切换英文模式报错

[beyondkmp]

squirrel版本：https://bintray.com/rime/squirrel/testing/0.14.0%2Bgit08ed4f4

现象：使用shift切换不到英文模式

具体日志信息：

I1128 11:19:26.781690 226301376 engine.cc:126] updated option: _auto_commit
I1128 11:19:26.781769 226301376 dictionary.cc:261] loading dictionary 'wubi86'.
I1128 11:19:26.781885 226301376 engine.cc:126] updated option: ascii_mode
I1128 11:19:26.781891 226301376 engine.cc:126] updated option: simplification
I1128 11:19:26.781895 226301376 engine.cc:126] updated option: show_emoji
I1128 11:19:26.781963 226301376 engine.cc:126] updated option: ascii_mode
I1128 11:19:26.781991 226301376 engine.cc:126] updated option: vim_mode
I1128 11:19:26.782002 226301376 engine.cc:126] updated option: _horizontal
I1128 11:19:26.782286 226301376 engine.cc:126] updated option: soft_cursor
I1128 11:19:52.034945 226301376 engine.cc:126] updated option: ascii_mode
I1128 11:19:52.193743 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:19:52.278646 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:19:52.329253 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:19:52.656656 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:19:52.765450 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:19:52.774610 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:19:53.037333 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:19:53.089095 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:19:53.098453 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:19:53.679913 226301376 engine.cc:126] updated option: ascii_mode
I1128 11:19:54.791826 226301376 engine.cc:126] updated option: ascii_mode
I1128 11:19:54.806118 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:19:54.901844 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:19:54.909381 226301376 engine.cc:206] Oops, got a futile translation.
I1128 11:20:12.073340 226301376 engine.cc:71] starting engine.