Re: History Expansion in Arithmetic Expansion

[A4-Tacks]

Thank you, this is very effective!



---- Replied Message ----
| From | alex xmb sw ratchev<fxmbsw7@gmail.com> |
| Date | 03/23/2024 23:38 |
| To | A4-Tacks<wdsjxhno1001@163.com> |
| Cc | bug-bash<bug-bash@gnu.org> |
| Subject | Re: History Expansion in Arithmetic Expansion |



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 ))