'bind "\C-?": delete-char' does not work any more

[Martin Stockinger]

Configuration Information [Automatically generated, do not change]:
Machine: sparc
OS: solaris2.7
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='sparc' 
-DCONF_OSTYPE='solaris2.7' -DCONF_MACHTYPE='sparc-sun-solaris2.7' 
-DCONF_VENDOR='sun' -DLOCALEDIR='/global/os/versionen/bash-3.0/share/locale' 
-DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H  -I.  -I. -I./include -I./lib   -g -O2
uname output: SunOS ixprod1 5.7 Generic_106541-34 sun4u sparc 
SUNW,Ultra-Enterprise
Machine Type: sparc-sun-solaris2.7

Bash Version: 3.0
Patch Level: 0
Release Status: release

Description:
    With the new bash release the binding of some keys does
    not work any more.
        I want to bind the DEL key to the function "delete-char".
        It is always bound to "backward-delete-char" and I can't change it.
        With previous bash releases it works.

    bash> echo $BASH_VERSION
        3.00.0(4)-release
        
    bash> type bind
        bind is a shell builtin
        
    bash> bind -p | fgrep '"\C-?"'
        "\C-?": backward-delete-char

        bash> stty erase 
        bash> bind "\C-?":delete-char
        bash> bind '"\C-?": delete-char'
        bash> bind 'DEL: delete-char'
        
    bash> bind -p | fgrep '"\C-?"'
        "\C-?": backward-delete-char