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From: Mike Jonkmans <bashbug@jonkmans.nl>
Newsgroups: gnu.bash.bug
Subject: BASH_ALIASES assignment allow special characters
Date: Sun, 27 May 2018 10:20:57 +0200 (CEST)
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Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-pc-linux-gnu' -DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H   -I.  -I../. -I.././include -I.././lib  -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fdebug-prefix-map=/build/bash-vEMnMR/bash-4.4.18=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -Wno-parentheses -Wno-format-security
uname output: Linux sint 4.15.0-22-generic #24-Ubuntu SMP Wed May 16 12:15:17 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 4.4
Patch Level: 19
Release Status: release

Description:
	The special array BASH_ALIAS allows assignment/creation of aliases with
	special characters in it.
	Though these characters would error when used in an alias statement.

Repeat-By:
	BASH_ALIASES+=(['/x']=echo)
	/x echo
	! alias /x=echo
	## bash: alias: `/x': invalid alias name