Re: History Expansion in Arithmetic Expansion

[alex xmb sw ratchev]

On Sat, Mar 23, 2024, 16:34 A4-Tacks <wdsjxhno1001@163.com> wrote:

> Configuration Information [Automatically generated, do not change]:
> Machine: aarch64
> OS: linux-gnu
> Compiler: gcc
> Compilation CFLAGS: -march=armv8-a -O2 -pipe -fstack-protector-strong
> -fno-plt -fexceptions         -Wp,-D_FORTIFY_SOURCE=2 -Wformat
> -Werror=format-security         -fstack-clash-protection
> -DDEFAULT_PATH_VALUE='/usr/local/sbin:/usr/local/bin:/usr/bin'
> -DSTANDARD_UTILS_PATH='/usr/bin' -DSYS_BASHRC='/etc/bash.bashrc'
> -DSYS_BASH_LOGOUT='/etc/bash.bash_logout' -DNON_INTERACTIVE_LOGIN_SHELLS
> uname output: Linux localhost 4.14.116 #1 SMP PREEMPT Tue Mar 22 15:13:10
> CST 2022 aarch64 GNU/Linux
> Machine Type: aarch64-unknown-linux-gnu
>
> Bash Version: 5.2
> Patch Level: 26
> Release Status: release
>
> Description:
>      I am unable to use logical inversion operators in line
>      arithmetic extensions, nor can I escape them, which is undoubtedly
> abnormal
>
> Repeat-By:
>      ```bash
>      $ ((!RANDOM))
>      bash: !RANDOM: event not found
>      ```
>

small workaround

(( ! bla ))

>