"echo !xxx" causes unexpected end of nyagos.

[masamitsu-murase]

When I enter "echo !xxx" on nyagos, nyagos exits unexpectedly as follows:

$ echo !xxx
!xxx: event not found
exit status 1

I checked this issue with nyagos 4.4.9_3.

It seems that this issue is caused by d5ca8a4.
When Replace in history/history.go fails to replace !xxx in command line, the error is propagated to ForEver in shell/loop.go.
Then, the error ends for loop in ForEver in shell/loop.go.

[hymkor]

Thank you.（ありがとうございます）

It seems that this issue is caused by d5ca8a4.

Right.

d5ca8a4 can not be reverted for #383 and other unexpected errors.
So, I fixed the called subroutine to display the error only but not to quit the shell on c3cae83

（そのとおりでした。とはいえ #383 や他の予期せぬエラーのために d5ca8a4 を消すわけにはいかないので、もっと下流の方で、ヒストリーのエラーを表示するだけにとどめておくよう修正しました）

[masamitsu-murase]

Thank you so much for your prompt response!
I verified that your fix, c3cae83, worked fine!

Let me close this issue.