On Sun, Aug 25, 2024 at 8:57 PM <youheng....@gmail.com> wrote:
>
> All the following scripts can create a Segmentation Fault
>
> eval '<$[;]'
>
> eval '<$(;)'
>
> eval '<${;}'
>
> eval '<$[|]'
>
> eval '<$(|)'
>
> eval '<${|}'
Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: msys
Compiler: gcc
Compilation CFLAGS: -g -O2
uname output: MSYS_NT-10.0-19045 Zack2021HPPavilion
3.5.3-d8b21b8c.x86_64 2024-07-09 18:03 UTC x86_64 Msys
Machine Type: x86_64-pc-msys
Bash Version: 5.3
Patch Level: 0
Release Status: alpha
This is devel, commit 2e01122fe7.
Really don't get what's going on here:
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ ./bash
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ declare -p BASH_VERSION
declare -- BASH_VERSION="5.3.0(1)-alpha"
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ eval '<$[;]'
bash: ;: arithmetic syntax error: operand expected (error token is ";")
[1]+ Stopped
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ eval '<$(;)'
bash: syntax error near unexpected token `;'
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ eval '<${;}'
bash: ${;}: bad substitution
[2]+ Stopped
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ eval '<$[|]'
bash: |: arithmetic syntax error: operand expected (error token is "|")
[3]+ Stopped
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ eval '<$(|)'
bash: syntax error near unexpected token `|'
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ eval '<${|}'
bash: ${ }: ambiguous redirect
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ jobs
[1] Stopped
[2]- Stopped
[3]+ Stopped
I now have anonymous, stopped background jobs, I guess.
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ fg 1
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ jobs
[1]+ Stopped
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ fg 1
zsant@Zack2021HPPavilion MSYS ~/repos/bash
$ jobs
[1]+ Stopped
Okay.
