BUG: Brace expansions do not support any type of variable.

From: ignas
To: [email protected]
Subject: BUG: Brace expansions do not support any type of variable.

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -g -O2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -flto=auto -ffat-lto-objects -fstack-protector-strong -fstack-clash-protect>
uname output: Linux IgnasUltra 6.6.87.2-microsoft-standard-WSL2 #1 SMP PREEMPT_DYNAMIC Thu Jun  5 18:30:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 5.2
Patch Level: 21
Release Status: release

Description:
        There is a bug that doesn't let accept variables in brace expansions. Ex: {0..$foo}
        Please add the ability to add variables to brace expansions.

Repeat-By:
        foo=3
        for x in {0..$foo}; do
        echo $x
        done
The output will be "{0..3}"
instead of the expected:
        0
        1
        2
        3

Fix:
        Allow brace expansions to accept variables.