Dear developers,

with "setopt GLOB_SUBST" the widget edit-command-line just prints an error and 
exits on my systems. Adding "noglob" to the function fixes it.

Tested environment:
Debian stretch with zsh 5.3.1 (x86_64-debian-linux-gnu)
Terminals:
  * Konsole 16.12.0 (TERM=xterm-256color)
  * XTerm(327) (TERM=xterm)

With both terminals the value of zle_bracketed_paste was
  ( $'\e[?2004h' $'\e[?2004l' )

Steps to reproduce:
# env -i TERM=$TERM zsh -f
# setopt glob_subst
# autoload -U edit-command-line
# edit-command-line
(anon):6: bad pattern: ^[[?2004l

Proposed fix is attached.

Feel free to ask me for additional information.

Regards
Karsten