Hi Lauri,
Thanks for your report.
This is fixed in the devel branch (bash v4.4). I can confirm the issue in v4.3:
dualbus@hp ~ % { sleep 1; printf ': <(: <(: /etc/pass'; sleep 1; printf
'\t'; sleep 1; printf ') )\necho $?\n\030\026exit\n'; } | script -q -c
'/home/dualbus/local/src/gnu/bas
Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: darwin14.5.0
Compiler: clang
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64'
-DCONF_OSTYPE='darwin14.5.0' -DCONF_MACHTYPE='x86_64-apple-darwin14.5.0'
-DCONF_VENDOR='apple' -DLOCALEDIR='/usr/loca