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history -d fails to check for shortened list in loops

From: reisenweber at web de
Subject: history -d fails to check for shortened list in loops
Date: Mon, 6 May 2019 01:19:18 +0200 (CEST)

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc -I/home/abuild/rpmbuild/BUILD/bash-4.4 
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-suse-linux-gnu' 
-DCONF_VENDOR='suse' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL 
-DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib   -fmessage-length=0 
-grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong 
-funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -g  
-D_GNU_SOURCE -DRECYCLES_PIDS -Wall -g -Wuninitialized -Wextra -Wno-switch-enum 
-Wno-unused-variable -Wno-unused-parameter -Wno-parentheses -ftree-loop-linear 
-pipe -DBNC382214=0 -DIMPORT_FUNCTIONS_DEF=0 -fprofile-use -fprofile-correction
uname output: Linux saturn 4.12.14-lp150.12.48-default #1 SMP Tue Feb 12 
14:01:48 UTC 2019 (268f014) x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-suse-linux-gnu

Bash Version: 4.4
Patch Level: 23
Release Status: release

        `history -d` doesn't check for "history position out of range" until 
bash returns to prompt

        find number of last history line:  `history|tail -n1`
        `history|tail -n4; while history -d $NUM_LAST_LINE; do sleep 0.1; echo 
-n .; done`
        abort ^C
        run again
        compare to a single `history -d $(( NUM_LAST_LINE + 1 )); echo $?`

        bash needs to check for pointer out of range *immediately* 
        before each `history -d` using the *true* recent length of 
        internal history list and throw error accordingly

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