Turning off job control doesn't make async jobs ignore SIGINT

[AnMaster]

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: x86_64-pc-linux-gnu-gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-pc-linux-gnu' 
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL 
-DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib   -march=k8 -pipe -O2 -msse3
uname output: Linux tux 2.6.22-gentoo-r5 #1 Mon Aug 27 18:24:02 CEST 2007 
x86_64 AMD Sempron(tm) Processor 3300+ AuthenticAMD GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 3.2
Patch Level: 17
Release Status: release

Description:
>From man bash:
       Non-builtin  commands  run by bash have signal handlers set to the 
values inherited by the shell from its parent.
       When job control is not in effect, asynchronous commands ignore SIGINT 
and SIGQUIT in addition to these inherited
       handlers.   Commands  run  as  a result of command substitution ignore 
the keyboard-generated job control signals
       SIGTTIN, SIGTTOU, and SIGTSTP.

This doesn't seem to be the case. When job control is not in effect, async jobs 
still get SIGINT sent to them even if
SIGINT is sent to the main process.

As far as I can see I should get "After quit" printed out and netcat should not 
have died before the trap got run.

After asking for this in #bash on irc.freenode.net
<@greycat> The man page says "When job control is not in effect, asynchronous 
commands ignore SIGINT and SIGQUIT as well."
<@greycat> My initial testing with #!/bin/bash   set +m    nc gateway 25 &   
wait     Doesn't work, though.  Ctrl-C kills both.
I also got told I should report a bug using bashbug.

Repeat-By:
$ cat > test.sh
#!/bin/bash
set +m
trap 'echo got INT; ps aux | grep "$PID"; echo QUIT >&3; echo After quit' INT
mkfifo /tmp/in
mkfifo /tmp/out
nc irc.kuonet-ng.org 6667 < /tmp/out > /tmp/in &
PID="$!"
exec 3>/tmp/out
exec 4</tmp/in
wait
$ bash test.sh

got INT
anmaster    10438  0.0  0.0   2780   576 pts/8    R+   21:36   0:00 grep 10436