[Help-bash] readline does not always handle SIGTERM on reboot

[john smith]

Hello,

I'm using bash 4.4.18 with busybox.  When reboot is done SIGTERM is
sent to all processes by busybox init.  The problem is that while
SIGTERM is always handled by sigterm_sighandler() in bash at reboot
it's not always handled by rl_getc().  I did 10 attempts and SIGTERM
has been not handled by rl_getc() in 8 cases.  It's problematic
because rl_get() returns EOF on SIGTERM and it makes bash perform
logout and save history.

When I start a new session via telnet and kill a previously started
bash session opened on serial console I can see that SIGTERM is
handled in rl_getc() every time.

What can be the reson rl_getc() does not handle SIGTERM on reboot?
-- 
<address@hidden>