inputrc do-lowercase-version self-referential footgun

[Branden Robinson]

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: cygwin
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash.exe' -DCONF_HOSTTYPE='x86_64'
-DCONF_OSTYPE='cygwin' -DCONF_MACHTYPE='x86_64-unknown-cygwin'
-DCONF_VENDOR='unknown' -DLOCALEDIR='/usr/share/locale'
-DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H -DRECYCLES_PIDS   -I.
-I/usr/src/bash-4.3.46-7.x86_64/src/bash-4.3
-I/usr/src/bash-4.3.46-7.x86_64/src/bash-4.3/include
-I/usr/src/bash-4.3.46-7.x86_64/src/bash-4.3/lib  -DWORDEXP_OPTION
-ggdb -O2 -pipe -Wimplicit-function-declaration
-fdebug-prefix-map=/usr/src/bash-4.3.46-7.x86_64/build=/usr/src/debug/bash-4.3.46-7
-fdebug-prefix-map=/usr/src/bash-4.3.46-7.x86_64/src/bash-4.3=/usr/src/debug/bash-4.3.46-7
uname output: CYGWIN_NT-6.3 Lenovo-PC 2.6.0(0.304/5/3) 2016-08-31
14:32 x86_64 Cygwin
Machine Type: x86_64-unknown-cygwin

Bash Version: 4.3
Patch Level: 46
Release Status: release

Description:
* There's a footgun in inputrc processing.
        # Footgun!
        # Control-y: do-lowercase-version # WEDGES GOOD!

        # Not a footgun.
        # Probably because do-uppercase-version isn't actually recognized.
        # Control-Y: do-lowercase-version
        # Control-y: do-uppercase-version

Repeat-By:
        Put the "WEDGES GOOD!" line above into your ~/.inputrc.
        C-x C-r
        echo $$
        C-y
        Go kill $$ from some other terminal.