5.1-alpha: X primary selection being pasted in reverse video

[balducci]

hello

I actually don't know if this is a real problem with 5.1-alpha or if
it's something related to my environment and/or build procedure

The problem is the following

If I paste in a terminal running 5.1-alpha a string stored in the primary X
selection, the string is inserted in reverse video
(actually, not a big problem, since I'm not experiencing any other
additional malfunction...)

I'm not in the position to debug this. I can just add some empirical
observations I have done about it:

=> no problem whatsoever if I run bash-5.0 (pl17) (everything else unchanged)
=> the problem doesn't seem to depend on the particular terminal
   program: xterm (my usual terminal), mlterm, vte (terminals I have at hand)
=> the problem goes away if I set the value of the TERM variable to
   something different from "xterm"; even unsetting TERM altogether
   fixes things
=> the problem goes away if I run screen in the terminal (this is
   probably related to the point above, as screen changes the TERM
   variable from "xterm" to "screen")
=> no problem if I'm not running X, eg if I make a selection and paste
   it with gpm in a console (again: TERM=linux in this case)

On the whole, it looks to me that the problem might be related (in some
way) to the interaction of 5.1-alpha with the terminal program when
TERM=xterm

Possibly related to this thread?
https://lists.gnu.org/archive/html/bug-bash/2020-06/msg00066.html


Apologies: as I said, my knowledge is insufficient to let me go deeper
than this

I enclose "stty -a" and bash build information below, if that can be
of any help

thanks a lot

ciao
-gabriele

    ----8<----
    Configuration Information [Automatically generated, do not change]:
    Machine: x86_64
    OS: linux-gnu
    Compiler: gcc -m64
    Compilation CFLAGS:  -I/usr/Xorg/include 
    uname output: Linux dschgrazlin2 5.7.3 #1 SMP Thu Jun 18 09:18:36 CEST 2020 
x86_64 GNU/Linux
    Machine Type: x86_64-pc-linux-gnu

    Bash Version: 5.1
    Patch Level: 0
    Release Status: alpha
    ---->8----

    ----8<----
    dschgrazlin2:17> stty -a
    speed 38400 baud; rows 24; columns 80; line = 0;
    intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
    eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = 
^R;
    werase = ^W; lnext = ^V; discard = ^O; min = 1; time = 0;
    -parenb -parodd -cmspar cs8 -hupcl -cstopb cread -clocal -crtscts
    -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon 
-ixoff
    -iuclc -ixany -imaxbel iutf8
    opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 
ff0
    isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt
    -echoctl echoke -flusho -extproc
    ---->8----