! in PS1 in posix mode

From	isabella parakiss <izaberina@gmail.com>
Newsgroups	gnu.bash.bug
Subject	! in PS1 in posix mode
Date	2015-10-11 07:37 +0200
Message-ID	<mailman.78.1444541864.7904.bug-bash@gnu.org> (permalink)

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In posix mode, bash replaces ! in my PS1 with the history number.

$ PS1=' ! '
 ! set -o posix
 513 exit

It doesn't happen with any other prompt escape sequence, afaict.
This looks... intentional?  WTF?


---
xoxo iza

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! in PS1 in posix mode isabella parakiss <izaberina@gmail.com> - 2015-10-11 07:37 +0200

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