upgrading past 8.2.2918 loses access to /dev/tty from athena gvim

Hi,

macos-10.14.6
./configure --disable-darwin --with-x --enable-gui=athena --with-features=huge

I just upgraded vim from approximately 8.2.2550 to 8.2.3501
and something important has stopped working (from gvim).

I have an autocommand group for editing gpg1-encrypted files.
It executes gpg1 via a shell and that requires access to /dev/tty.

Before the upgrade, it worked in vim and (athena) gvim (i.e.
it would ask me for the passphrase). After the upgrade, it no
longer works in athena gvim. gpg reports:

gpg: cannot open tty `/dev/tty': Device not configured

The last version where this works is 8.2.2918.
The first version that doesn't work is:

8.2.2919: using ":!command" does not work if it uses posix_spawn()

That patch removed this:

diff --git a/src/os_unix.c b/src/os_unix.c
index 20c61106f..0a4f0e698 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -4775,11 +4775,6 @@ mch_call_shell_fork(
// push stream discipline modules
if (options & SHELL_COOKED)
setup_slavepty(pty_slave_fd);
-# ifdef TIOCSCTTY
- // Try to become controlling tty (probably doesn't work,
- // unless run by root)
- ioctl(pty_slave_fd, TIOCSCTTY, (char *)NULL);
-# endif
}
# endif
set_default_child_environment(FALSE);

If I run :!tty, it outputs /dev/ttys007, so I tried
replacing "!gpg1" in the commands with "!GPG_TTY=`tty` gpg1"
in the latest version, but that didn't work.

Any idea what I need to do to restore access to /dev/tty
from the athena gui? Or do I have to downgrade to 8.2.2918
and stay there?

cheers,
raf

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